Welcome to Worms Armageddon / The Ultimate Site.
I like to categorize all schemes into 3 categories:
Artillery - This includes everything where the main focus/skill of the scheme is accuracy with firing weapons at other worms, so memorizing weapons and how they work is important, e.g, BnG, Hysteria, Aerial, Boom Race, Golf, Fort, etc.
Strategic - This includes everything where the main focus/skill of the scheme is strategic planning, adaptation and execution, trying to out-think your opponent, e.g, Team17, Elite, Intermediate, Abnormal, Mole Shopper etc.
Physical - This includes everything where the main focus/skill of the scheme is a players physical ability, with reflexes and hand to eye coordination being extremely important. These schemes use utilities and weapons such as Ninja Rope / Bungee Rope / Jetpack to play schemes such as Roper, Wascar, Big RR, Tower Race, Bungee Race, Jetpack Race, Super Sheep Race, Trick Race, TTRR, WxW, Darts, Warmer etc.
Most players tend to specialize mostly in 1 of these categories, however it's not unusual for some players to excel in all 3 categories.
The great thing about this game, each scheme takes 5-10 minutes to learn, and possibly years to master, among other things, they range in difficulty, luck, skill and length of average time for a game to finish.
The first thing I would advise you to do is to familiarize yourself with the most common schemes people play and the rules:
https://worms2d.info/SchemesIf you visit this page linked directly above, you can spend some time reading up on the various schemes to find out some basic information and even some pages have replays available for download so you can have a look quickly.
If you already have some basic experience and know which schemes you enjoy, i'd follow the advice of Rudolf289 and search through League games here from top players in each scheme, that way you can see the possibilities and techniques used, and attempt to learn them yourself.
Feel free to ask absolutely anything you want and we'll do our best to answer.