Stabilisers don't teach you to how to balance on two wheels, which is the first thing you need to learn.Someone was telling me to get stabilizers at the beginning to get used to being on the bike... But I'm not sure...
^^ because that's how it should be done.I'm no expert, but I understand the best way to learn to ride is to remove the pedals, lower the seat and then scoot it along with your feet. This teaches you how to balance (check out how children learn on balance bikes, its the same concept).
I'm sure you'd be able to find a bikeability instructor locally who has experience of teaching adults to ride.