ProfileService Guidance / Support

I recently swapped from attempting to use DataStore2 to ProfileService and I am having some trouble figuring out how I am able to get the module to save bits of data, how to check it and where I put all the bits of code / scripts.
This is a bit of a desperate option to post on the forums as I usually manage to figure these things out but I’m really struggling to wrap my head around this.
Any guidance or help is appreciated.