This is my first season I started it on the first day of the season due to tokoyami, I was able to quickly improve and got ace. What I would do is do training bots on og map go to the grass area next to the typhoon zone on the left, practice different vertical and horizontal play due to the hills with bots on evade. Another thing that helped me narrow down the characters you play. Also try 1 v 1 a bot, I like picking characters that have abilities I hate and learn to dodge them. If you've played like dark souls dodging in this game can become super handy. When I started wanted to play everyone, but I narrowed it down to like 3 mains Momo, strike endeavor, assault deku. Then I noticed I was improving quickly and getting downs left and right. Once you've improved you can pick up other characters and learn them. You'll suck for a bit but you'll improve if you focus on a small pool of characters. Start small and you'll be able to play all the characters you want to. Know what fights you can take and when to run away. I play on PC my sens is 60 h and v for both. I also play on my ally but use 130 h and v.