@goandaskdaddy
You'll be asked for idea by several bookies over time. I've been doing this since 23rd April and have had to send documents into about five bookies now. There doesn't seem to be any formula to it, you may go months without being asked, or you could be asked straight away.
I was asked to send my documents into sunbets before I'd even places a bet, other people don't get asked for months, if at all.
The times I've been asked for I'd they want driving license or passport. A photo of front of debit card used to deposit. A recent untility bull or bank statement with address on. It's worth gathering them together and saving in folder your device so that you everything to hand when you do get asked.
If you are still unable to place bets today and you've tried a different browser then I'd recommend contacting them.
@aloealoe
You will still make profits if you use free bets on odds lower than 5, odds of five and above are recommended to gain the maximum profits from free bets, as you've realised though, the higher the odds, the higher the liquidity for the matching lay bet. It can slow you down when starting as if you have a small float you and your bet wins at the bookie, you have to wait until withdrawal is cleared into your bank account to be able to put back into exchange for the next offer.
When I started I had £60. I chose smaller odds for free bets and often still do even though my pot is £700ish now because I try to keep my qualifying bets and free bets at similar odds as I've read that consistently betting on minimum odds with real money and then jumping up to high odds with free bets is behaviour if matched bettor. No idea how much truth is in it though.