How do you rate 5.e3 in these 2 situations and what alternatives do you suggest?

but what if i don't want to play queen's gambit and avoid both Nc3 and c4?is there a better alternative or not?

Maybe you are right..

In the first example, 5.e3 is fine, although it is a very tame position and Black is equalizing . 5....Bb4 is nothing to be afraid of. Just play Bd3 and continue developing.

In the second example, I don't think 2...Bf5 is very good. Why not 3.cxd5? 3...Qxd5? is obviously bad ( 4.Nc3 and 5.Qb3). Black's best seems to be 3....Nf6, but I'd sure rather be white

Go for c3 instead, and avail yourself of the joys of the London.

Check out the London.  I've had good luck with it.

Nonsense.

There's a fundamental misconception in the chess community, based on appeal to authority.  That misconception says that the openings which best reward GM-strength understanding of tactics, strategy, position, middle-game play, and endgame preparation must also necessarily be those that best reward amateur play.

It just ain't so.  Amateurs playing without assistance will almost invariably make multiple strategic, positional, or tactical blunders even before getting very far into the middle game, no matter how strong their opening prep.  Once that happens, the "rewards" that might have come from flawlessly playing the Meran or whatever disappear.  And you'll be better served if you have a type of position you're insanely well-versed in, instead.

Not only are the London, Colle, BDG and other "system" type openings perfectly adequate at amateur levels, but if you're a less-than-master, and are playing less-than-master level competition down at the club or wherever, the case is easy to make that they are objectively stronger than the QG or the Ruy.

The four strongest players in my area play BDG, BDG, London, and junk, respectively.  My area ain't Moscow, but is yours?

Prefer c3 and Nbd2, it works better 

Nbd2 sounds good but also sounds for higher level than mine.But i don't know,it just "sounds" like that,maybe i am not "listening" very well

In fact Nc3 is for higher level than you as it may transpose to Barry attack if Black fianketoes his king bishop.

London system is a quite simple system for any level of players.Of course It is no recommended for you not because it is a bad system but because you need openings that are simple but also create "rich" in strategic concepts positions.

   If you understand London system , you will become good in London system.

If you understand Queen's Gambit you will understand chess. 

The very good and complicated openings always have a simple way to play them before you try the main lines.For example ,in Spanish you easily avoid all the lines with Andersen's 4.d3(or 5.d3).It will help you understand it and the main lines can become easier.

   In Queen's Gambit , a simple way to avoid complications is delay c4.It's not Queen's Gambit but you get "Queen's Gambit-type" positions.

In the games of the old masters you can find a lot of very good , theory-free ideas

In the next game , Isidor Gunsberg , one of the best players of his time,  develops as simple as possible(as white) , castles quickly and hits the centre after with c4(simplicity at it's best).The result though is a double edged position and an exciting game.

Chess at it's core is a simple game ruled by simple principles.You worry too much if your car will be red or blue(openings)and you stil don't know  where the gas and where the break are(basic principles).

a)i agree

b)i hope

c)helpful

d)i choose the colour of my car before i drive it!Maybe it is insignificant but it gives me more confidence.OTOH you are 100% correct that i should focus on basic principles..

Thanks!

"i choose the colour of my car before i drive it!Maybe it is insignificant but it gives me more confidence"

I know but that is exactly the mistake of all.Opening gives you a totally fake confidence.Even if I give you the 15 best first moves(let's assume they do exist) you will still lose 3 moves after without knowing what happened.

On the other hand if you play 15 not so good moves that you understand and you reach a not so good position that you understand , even if you lose you will have good chances to understand why and that means learn which means improve which means that wins ultimately will come.Seeing yourself slowly understanding more and more is REAL confidence.

    You feel more confident if the car has the color you want or if you know how to drive it?

You're right Michael-G

He can't.If he could, he would knew that they don't exist.