I've keep a rough mental track of the fodmaps in my foods and most of the time it works for me.
8 or so years ago (so things might have changed since then ) an NHS dietician took me through the initial 8 week phase which is very restrictive. After that you go through reintroducing foods one food at a time, one group of fodmaps at a time. You really need some sort of dietician help for this stage, as it's easy to get overwhelmed.
Then once you know your triggers you can eat a wider diet, eg if I know I'm going to have a lactose containing ice cream later then I will limit how many other moderate fodmap foods I will eat for the rest of the day.
Fruit is allowed, off the top of my head I'm sure you can have blueberries, grapes, strawberries, kiwi fruit but again portion sizes are important.
I have the Monash University app, a blue background with a black and white squiggly arrow.
One thing to be aware of, research changes what is low fodmap over time, so for example, when I started all cabbage was classed as high fodmap, but now white cabbage at a certain portion size is safe to eat.
I also find I still have other triggers that are low fodmap, eggs and lettuce are two of them so low fodmap is not a one and done solution.