Welcome to the forums.
The game is complicated enough that I recommend to people that their first play through should be a vanilla playthrough. Do the tutorials first (from the main screen which covers basic, advanced and fleet combat), try a few missions from the main screen to get used to piloting (or even run through all of them - although some missions are honestly hard), and then jump into the campaign and don't skip the tutorial for it. Do the campaign storyline at least once (some mods effectively eliminate it). Once you feel you understand the game and are getting bored of the work in progress end game, then start adding on mods. Understanding the base game will also give you insight into what kinds of mods you might enjoy, as well as how to evaluate mod faction ships.
There's everything from changing the game into 4x conquest game (Nexerelin), making the game harder (Ruthless Sector) or easier (advanced starts in Nexerelin), more random bonuses (Starship legends), more variety of ships (whole pile of faction mods), unique bounties and ships (Varya Sector and Ship/Weapon Pack come to mind), as well as quality of life mods. If you play the game, and come back and say you're interested in more X, then it's easier to recommend mods to you.