i have done research on what it means to be a sub and what it means to be a dom.
No matter how much research you make the thing is that how others navigate their relationships has no bearing on yours. What is important is what it means to be a sub
to you. Same for dominants. Subs and doms are individuals and relationships are unique. People have different needs, wants, expectations and whatnot.
the submisive submits because the submissive knows her/his dom will take care of them and that the sub needs her dom just like her dom needs his sub.
Some do, some don't. That is far from being universal. For ex., I don't submit to be taken care of or because of it. Not that it isn't a valid reason, just that it is not like that for everyone. If that's what you want or need then there's nothing wrong with it. However what can be wrong is assuming or expecting that it will be like that because you read it on the interwebs.
i feel like instead of my dom taking care of me... im taking care of him... is this a normal feeling when a sub first starts in this adventure or is it just me??
Normal is a setting on a washing machine. Either way can be "normal" if that's what both have discussed and agreed on. What have you discussed and agreed to with your dom?