What is better way to succeed in poker?play tournaments or cash game?
Depends really! I think a mix of both is good with cash being the bread and butter! You can use your cash money as buy ins to tournaments! Say you win two buy ins profit in a cash game you could then take half a buy in and enter a tournament with it! If you win then you're after increasing your bank roll a lot if you lose you're still in profit over all!
But to answer the question you would need a lot of money to start as a tournament player outright! The amount of times you won't cash meaningfully is rather large! So I'd recommend cash game try etch yourself a nice hourly consistently, continue to study and as your
bankroll grows enter a tournament every so often amf study like crazy! If you bink two or three tournaments in a year while consistently grinding cash you should have a nice chunk of profit to show for yourself!
But if you're only starting then the only question you should be asking is "which is fun for me"