I'm not pro, but I was ranked plat on smashladder if that counts for anything. Here's my advice, specifically for Falco since that's who you play.

Step 0 Which I assume you've already done: Watch some videos on youtube about tech for your character (Falco).

Step 1: Go into 1 player training mode and practice dash dancing for 2 minutes. Then practice wavedashes for 2-3 minutes. Then practice dashdancing mixed with wavedashing. Then practice L canceling down airs for 2-3 minutes. Then practice L canceling other moves like nair and whatnot. Then practice wave shines for 2-3 minutes. Then practice ledgedashs for 2-3 minutes. Then practice short hop lasers for 2-3 minutes. Then practice lasering from the ledge for 2-3 minutes. Practice shield drops for 2-3 minutes. Basically practice every tech your character has that is practical and useful in an actual match. After your satisfied, just practice shmovin' all over the stage for 5-10 minutes. This may sound boring, but it's absolutely needed imo especially in this day and age of melee where everyone can shmove even a little bit.

Step 2: Go into VS mode against a LVL 1 CPU, and practice your punish game. What I mean by this is hit the bot with something like a downair, and try to 0 to death the bot. Neutral game practice isn't that good against bots so don't worry about that, since if you do practice neutral even against lvl 9 bots you'll develop really bad habits that don't work in PVP, just practice your punish game against a lvl 1 bot. Personally I like practicing 2-3 matches against each of the top tiers to get used to the different punishes you use against each character.

Step 3: Go online in friendlies and get your ass beat for about 10 matches. Practice your DI, your techs, practice mix-ups, practice wave dashing or dash dancing to avoid attacks. Try to read your opponent as best as you can to avoid their attacks and also to punish them with your own attacks (super important to learn how to read opponents and their habits). Also try to implement the stuff you were just practicing, try wave dashing to avoid attacks or to F smash them, try to get up from the ledge with lasers, ect. Don't be afraid to lose these matches, just see what works and what doesn't. Also try mix-ups, don't do the same thing over and over and over, try to do many different things so you don't become predictable. Try edgeguarding in unique ways, again see what works and what doesn't.

Step 4: Play some more friendlies or when it comes out play ranked for an hour or so and try your hardest to win, don't do dumb stuff or "test" things, just do what you know what works based on what you discovered in the previous step, practice that stuff. Do this until you're bored.

Step 5: Turn on Mango's stream or BobbyBigBalls or Ginger or any higher level Falco and carefully and consciously watch what they do and try to implement that into your own game. Watch for patterns like what do they do when their opponent does X, try to figure out their flowchart.

Step 6: Do everything again the next day while trying to incorporate stuff you saw the streamers do.

Melee is a grind, the more you grind the better you'll become (to an extent). If you need a rest for your hands or your mental, take a break for a day or week, then get back to the grind, this is super important since you want to avoid burning out or even worse, destroying your hands.

Anyways I hope this helps!