I've tried a lot of times for my first game but nothing works ,any advice to help me ?
Not sure which game you are referring to, there are two on your page... I tried Alien Games and I couldn't even get past the intro text, no keyboard input seems to do anything. Bubble escape works but, it is pretty basic in terms of gameplay, just dodging the same projectile over and over. It is fine for someone learning game development but just doesn't offer much to the player.
I would focus on just making something fun. Building a community around a game requires several things, first of all it needs to be a game that catches a lot of people's attention and that they want to keep playing for more than one session. Then there would have to be some reason for players to interact with each other in relation to the game. For example, people like to talk about different character builds for RPGs. They are not going to talk about how they got a high score in bubble escape, as there's one and only one strategy involved. You can't really force a community - it will build itself if people like the game enough and have something to connect with each other.
I think it also bears mentioning that Itch is a developer-centric community. Yes, there are players around as well, but a lot of them probably don't even have a registered account and therefore aren't going to be able to comment on your projects. Even if they do have an account, they aren't necessarily compelled to comment. Players who do have accounts are mostly here for a specific type of game, not to play all of our "my first/second/third game" projects in genres that they don't care about. So unless you have in-game interaction between players, or some other space for players to interact such as your own website/forum, it is unlikely that you will form a big community here. Niche interests can sometimes explode, and maybe projects that have a special appeal to other developers will get more interaction, but these are rare occurrences. It's just unreasonable for this to be your expectation, or to beat yourself up over not having a big following on Itch. If you have a really good product, and you bring it to the right market, it will do well. This is a pretty small market with certain specific interests. People who come here for visual novels are not going to care about your platformer, even if it is an exceptionally good game, they just aren't here for that. That isn't to say you shouldn't make platformers and upload them here, but if you want to reach more people you'll need to bring that to a market where people are actually looking for that specific thing.