>>37941031Basic 101: don't double up on type coverage unless one of those moves has a very specific purpose, if a pokemon doesn't have an AV or a choice item and it has 4 attacking moves you are probably doing it wrong, don't have more than two pokemon on a team weak to the same type, and make sure to have something with priority, something with Taunt, and something with Rapid Spin/Defog.
By all means, violate these once you know what you are doing, but just for starters, hold to them.
Additionally, think about the question "How does this team win?". The three most basic answers are by creating an opening for something to set-up and sweep, by surgically removing key-components/wincons in the opposing team, or by putting something on the field that the opponent can't KO.
Don't look into teambuilding guides at first, just pick a tier, and start playing around at first.
Whenever something beats you, think about what you could have done to prevent it, or what you could have had to stop it, and if it's a thing you could use back. Keep that information in your back pocket.
Toy around with teams liberally, but beyond minor tweaks to held item, EVs, and coverage, try to commit to a team for at least 5 or 6 matches, to get a feel for what the various parts of it actually do. When you find a pokemon that does a job particularly well, write it down, along with things that fuck with it.
As you get better, remember that lower-tier pokemon can sometimes accomplish a particular objective better than a pokemon from the same tier. Recall that, for instance, Quagsire, while rated in PU, has historically been remarkably easy to fit onto teams far outside of its supposed weight class than it might appear.
Look into teambuilding guides when you encounter a specific problem that you can't figure out how to solve. In the long run, you'll be better off if your own style is less predictable, and less grounded in "standard" strategies.