advice for a begginner

Looking briefly, you play nicely with a good understanding of initiative and tactics. You solved the sometimes awkward problem of opposite bishops well in the 2nd game. There was a quicker checkmate there 70.Rf5#, you instead grabbed another pawn. No harm done, you won a few moves later and were not in danger of missing the win. Just be careful not to get too materialistic in a winning position and just grab stuff instead if ruthlessly checkmating, it can sometimes complicate things. Post a loss of yours for better insights into areas you can improve upon.

Ok, both of the losses came with black vs slightly unusual openings which seemed to throw you off track slightly. In the 1st you allowed your pawn structure to be damaged then hurried to castle into a dangerous spot. In the second you dropped pawns for inadequate compensation. You still saw some tactics but were behind and it wasn't enough to recover. Looks like you like to play aggressively straight from the opening and it's not always possible to do that, especially with black. eg Nd4 followed by b5 in game 2 - too much too soon. If you secure your king and equalize the position first, then you can go for the tactical shots and ideas with much less risk, and much greater chances of success. You couldn't recover because your king was wide open eg. game 2 he was able to give check, move the knight and save the h1 rook. Landing your queen on that dangerous spot might have won a full rook if your king had been safely castled behind pawns on g8. And nothing wrong with playing what feels right - intuition. But sometimes as things get complicated you have to analyse and calculate exactly what the outcome will be. Use the intuition as a guide. Trust it, but also double check it.

Well played. White did not play so well here, wasting tempo in the beginning with e5 in particular. You again neglected the safety of your king but on this occasion it was fully justified as you simply blasted him away in the centre and you had a big initiative. f6 was a really nice move to gain the central domination and your willingness to play such a direct move rather than just developing routinely shows the plus side of your aggressive approach.

Well I guess the 'normal' play would have been 7.Bd6 instead of Be7, protecting the e5 pawn twice and then 8.0-0. As it turned out white thought he could put pressure by attacking this pawn again with Qe2, forcing e4 from you and then the Ng5 and Qc4 stuff which was just not working for him. So as it turned out you were absolutely ok to not castle here because white could not achieve anything. If you had played Bd6 and 0-0 I think you would still have had an advantage, just in a quieter position.

No worries, I hope you can make improvements. If you post lost games with your own analysis in the game analysis/showcase section and ask for advice you will get posters offering tips and analysis. Corum who posted his analysis here for example I have seen give good advice to loads of players.

@TS- This is because you only have few strategic and tactical pattern knowledge to rely on. You need to increase your pattern knowledge by studying chess more from books or videos.