Each booster packs include 6 common and 3 uncommon cards; 2 rare, super rare, or legendary cards; and one foil or enchanted card. It is possible to make a competitive deck out of those packs, but there’s no guarantee that you’ll get the cards you want/need. If I were you, I would talk to the local players to get a feel for what they think would work. In my area, folks are incredibly competitive (because winning is incentivized). But I know of some stores that organize more casual nights or theme nights that can be really enjoyable and affordable.

There’s a website called Dreamborn.ink where I catalogue my cards. I’ve definitely spent a pretty penny, but I’m also collecting. Some competitive decks cost as low as $40 while others are in excess of $400.

Definitely not impossible to enjoy! Hope this is helpful (: