We have a TON of tutorials on here for free. Use the search at top right (the magnifying glass icon) and type “tutorial” and another keyword to find these.
Here is a getting started with magick guide. You’ll want to get your spiritual hygiene sorted out, and start work on developing your astral senses, then when you can know you have a decent chance at avoiding impostors and parasites then try the evocation guides we have on here.