I've done it twice and would highly recommend it.
Don't worry if you've never cycled much. Neither had I.
You just need to do a few training runs starting with shorter runs and building up to a 3/4 length run about a week to 10 days before the run.
A few other tips is do not use a mountain bike a hybrid or road bike will make it much easier.
I used a ruck sack with the water pouch in it which I preferred to a bottle. Some bananas and energy bars/chocolate is the only food I packed.
Also pack a waterproof just in case.
Lastly there's a few organised stops which are mostly ok however if I was you I'd avoid going into the organised Linlithgow one. It takes ages to get back out again. A lot of folk just stop on the main street.
I've never bothered with the Kirkliston stop as it's quite soon after Linlithgow and by that point you're keen to push on into Edinburgh.
It really is well worth it and you get a great sense of achievement.
Happy to answer any questions you might have.