@Jasminemoon practicing and learning search methods only will take you so far though. When attempting to fill out a recent request on this site the,solution was to search the value with byte separation i.e. value is 90 in game so search 90x4 for a byte separation of four bytes, but I had overlooked this method as it isn't used as much and I don't have to use it very often. So remember to frequently revisit learned stuff just so you stay refreshed and you can probably save yourself sometime later on down the road, I would've probably spent the better half of a few hours trying to mod the apk had @Farmeriscool not provided the proper search method. I'm not too good at apk modding yet.
Incase you do come across something that you can the life of you cannot figure out and you decide to consult these forums some information that's really helpful to provide in your posts are the methods you've tried the playstore link for the app what you're attempting to edit, and any other odd things that you notice that doesn't correlate with the status quo of similar games
Sorry if any of this is over complicating things I do have a really circumventing on my explanations