Fishing is worth it. The more time you put in the more you get out of it. Once you hit 49 you'll start making some really decent money (when considering other sub-60 farming methods

). When you hit 76 that's when the real cash starts coming in.
Once you hit 75 and start playing in large groups or doing other stuff, sure, there are better ways to make money including OWNMS and BCNMs. But for a new player such as myself, fishing has been very good to me and takes minimal input from the user. I typically watch something on Netflix while I farm or play guitar IRL.
Good luck to you, 0-5 sucks. Follow the vendor guide by Meeeps or Nightcoder