Best gun to aim up for depends on different factors. The worth of spending on a game is rather subjective— support a game if it makes you happy.
And you don’t ask how to create your character, Graal already allows you to do that. If you mean make your own customs, then hook up some YouTube vids, lots of them there (including making GIFs). Templates can easily be searched up as well.
P.S. if you call 2015 “OG”, then you haven’t seen anything yet.