1. time fishing is fine, you just relax and hit control whenever u heard fish bite. Its very relaxing this way.
2. Fish is rng.
3. Fishing is fine this way, just fishing isnt for you really.
You can have some good luck knowing how the fish tug and wich bait using by experience, it restricts over 80%-90% unwanted fish.
4. Yes using cordials is TOO op, you really get LOTS of wanted fish if you do it in proper way. Also, patience is not 100% hq is very greatly increased HQ.
5. If you hunting for a some few specific fish, you not need to keep all bait with you. Also if you are not training desynth or getting crystals, you better trash/sell those unwanted fish.

Chum is a waste gp skill.

If you want no waste time to get some fish (that not be untradable) then just buy it, 0% rng and 100% guaranteed u need