It does make sense, but you have to remember, comics, and in many ways X-Men especially, are basically soap operas with superpowers, and much like soap operas, it can be difficult to get back into it after you've been gone for a while. It'll feel both familiar and alien at the same time, you recognise bits and pieces but how those ended up where and who these new people are will be confusing, at least for a bit. Luckily, there are people who are way more into this who can explain it for you, and point you to good collections and answer any questions raised from missing out on the bad stuff.

Edit: The X-Men '90's series captures the feel of the '90's comics exceptionally well, despite that fact that the '90's were EXTREME, often to the point of hilarity and TV censors wouldn't necessarily sign off on that. It can be goofy as fuck, but it's also oddly charming. There was a comic that came out recently called X-Men '92 that's inspired by/based on the '90's cartoon, I've heard decent things about it.

I live in small city in portugal so my library doesn't have them

The way I see it, it's a stable starting point because there isn't any annoying reboots or sudden continuity snarls; and it's a form of the X-Men are quite familiar with.

Also, it's just a good show.

I have already seen the TV series and it's what made me like so much X-men

It's kind of a "definite" version of the X-Men for me because of that lack of continuity issues. It's true to the comics, but actually makes sense. And has a stable roster of characters, instead of the billion different members on dozens of X-teams.

Thank you so much for the recommendation and explanation of everything, i will look into them and put them on my list of book i have to read :)
Since The Epic collection Second Genesis seems tobe a better alternative to the Marvel Masterworks and a cheaper one so next month will be the fist thing i buy :)

That TV show was also my introduction to the X-Men. It was, without a doubt, one of the best Marvel cartoons ever produced. :)

No problem, glad to be of help. :)

Cool, I hope you enjoy the comics! I think you will like them since you mentioned you liked the 90's cartoon and these old stories are closer to the TV series than the more modern comics. Some of these stories were adapted into the cartoon, with big changes, but still keeping the spirit of the source material. :)