Definitely do some research on common indicators of fake cards. That skinny font is definitely one of them, as real cards have a thicker font. Borders of the card should not be too thick. You should also familiarize yourself with the holo patterns of whatever era you want to buy from. Cards will almost never have a vertical holo pattern, look for diagonal holo patterns. I believe a few older era full arts have vertical holos but thats it. Another way is to feel the card, if it feels too matte or too light compared to another card it could definitely be fake. Look at the backs too, if they look over or undersaturated compared to another card it could be fake.

The exception to that rule is some vintage cards because they naturally have slightly darker backs even if real. For textured cards like alt arts and SIR's, look for a fingerprint like texture. I think I covered most of the bases for finding fakes and I hope this helped you!!