How many games played with a certain opening before you 'get it'?

After a couple years of dabbling in chess, I'm looking to actively improve my play/rank. I decided to exclusively play 1 opening for each color, London for White and Sicilian for black, until I feel I fully understand the opening systems and how to win games with them consistently.

My elo has gone up by about 75 points sticking to these openings, mostly against 600s who didn't know how to counter them. Now I'm in 700s, running into stronger opponents who know the openings and counters to them and forcing me to really think through each move. All good for improvement.

Eventually I would like a much larger collection of openings for each color to avoid the boredom of playing the same pattern ad nauseum.

My question is, if you've done similar, how many games did you play with a particular system before you felt you had a really strong understanding of it and were ready to move on to something else.

Yes after occasionally playing against bots on the app for a year and using the hints to learn, I decided to exclusively play the Colle system with white (I developed by myself but later discovered that's what it is called) and Philidor defense as black.

I've played about 1000 games now using this combination of openings, and just in the middle of really locking in on them (900 Rapid, 1300 Day), not yet in the phase moving on. If I reach a point I'm not advancing in rating or bored as you state, I will switch to the Jobava system and Italian game, maybe with a new account.

What are the next openings you'd switch to?

I'm not sure what to learn next, I chose those two systems based on Youtube videos of GMs explaining them to new players so I suppose I'll get more ideas from there!

For myself, I'm still not quite sure for some opening line in my opening chess repertoire. Maybe there's more better move, but I'm lazy, so as long as it didn't make me losing in early game, it's good enough for me.

It takes around 30-50 games until I get a basic understanding of a new opening. However, whenever I climbed 200 points in rating I got to play people that suddenly exposed my openings with different ideas. It makes me realize I don't get the opening.

I was above 1700 until I learned to play advanced, exchange and tartakower variation of caro-kann properly. I still feel uncomfortable playing against panov, flower, and the gambit variations of caro-kann.

I started playing tarrasch variation of the french defense and even though I know the basic moves, and that I like the positions I usually get out of the opening, I can't say that I get the opening. If I played someone that truly understood that variation they would smash me to pieces.

Fortunatelly you don't need to understand the opening to do decent, you just need a chess position and play from there.

I still play with e4 then I just improve

Before that the scholar's mate, randomly moving pieces, and the great wall of china