Tbh I lost track of what you (might) have done.
You need to start this with small steps (even if you miss out on the big offers)
You must sign up with a good site like oddsmonkey or similar. (try the free version)
A lot of ppl made and continues to make a lot of money but as with any new skills it takes time to learn it.
As a first bet you might find to spend hours to get around just on the bookies website, at your hundreds bet, it will take two seconds and you can do with one hand, on your phone it while feeding a 2 years old 😂 (although not recommended)
Each way.. 😂 Forget it for a while. (you need to place 3 bets. One back two lay) similarly any accas. And overall leave the horses alone for the first few weeks.
Familiarise yourself with terminology. It's critical. You need to understand which calculator to use and when. Especially if you make a mistake (everyone does) you could ask for help but if you don't understand the basic language used, nobody can help remotely.
So! Back to the basics.
Overall it's a very simple mathematical game. Effectively you buy something to sell it for a small loss which then gives you a bit more if that something for free. That you can then sell on for profit.
If helps do the first few bets with someone.
Unless you do one back bet (the outcome will happen, x team or horse or whatever win) AND simultaneously a Lay bet (the outcome will not happen) you are not matched betting just gambling.
PS. If you have any tenancy to be drawned towards any kind of gambling, stop now. Matched bettors are not gamblers and in fact most are very risk averse. (I would lay man city against a 5th division team from Hungary 😂 just in case) but the bookies are clever and designed their whole operation to bring you in!!!
Good "luck"