Keep practice chips separate from cash
The browser table at Roulette Manual starts with 1,000 practice chips. Those chips have no cash value.
Before your first spin, choose European single-zero or American double-zero roulette. Place a small practice bet, then check how the balance changes after the result. Keep the wheel choice fixed while learning where the bets go.
A practice session can help you learn the controls and read a bet. It cannot establish a way to predict the next spin. A staking rule changes the size of a bet. It does not remove the house edge.
The site also has rules, odds guides and worked strategy examples. Read the rule for the wheel you chose before treating a payout or loss as an error.