>>36037283Gen 2 and gen 3 era are sought after
If you've got some in good condition you should check how much they go for on eBay you might be pleasantly surprised
Pic related isn't even in mint condition yet it sold for $55
>How do I get started?You can try the digital game to see how much cards have changed since then
If you want to go for physical cards directly then look for a pokemon league near you:
https://www.pokemon.com/us/play-pokemon/pokemon-events/find-an-event/ if the store is any good they'll gladly introduce you to the game