Mate im definitely no expert at this, only new myself… But firstly only bet what you can afford to lose! Thats quite important…
I started by getting a matched deposit bonus for some free bets and then also put some money in betfair to lay with.
Just building up betting funds slowly working through some deposit bonuses. Eventually all going well you will have enough capital to leave money spread through multiple accounts.
Anyone with more experience want to give any more/better advice?