Want to get good at Blackjack? You can memorize some odds tables and then go have some fun! But remember, the house odds ALWAYS win in the long term. However, if you hold your own for a long time, you can often rack up a lot of perks.
For single decks, you can memorize the above table and play here https://www.arkadium.com/games/blackjack/
If you go to Vegas, things change up a little because they use different rules and often a lot more decks.