There are Lots of sites for arbing, some free, however the chances of maintaining accounts for any length of time are slim to say the least if you go down that route and higher odds don’t necessarily mean higher profit.
Ie currently there is one for £6.47 on odds of 31 / 27, total outlay £1550.00, there is another currently for £6.93, total outlay £208 so you can beat your £1550 odd outlay by putting £208 on a much lower one at odds of 2.15 / 1.96.
Do your own research before you dive in, don’t forget palpable errors can also affect results and may lead to voided bets on one side meaning a loss at the exchange, which if it were the former would leave you nursing one big loss.