shawzymoto don't worry too much about this for now, and welcome to the community. You're on the most secure and most private OS now, and that step alone is huge regarding your Google exposure. You can see it like Pareto: 80% are done with just as little as 20% of effort, and this might be more than enough for you.
Get familiar with the tools and settings GOS gives you. You're now back in control of your data, Google has no privilege on your phone. With features like storage/contact scopes, the network/sensor permissions and many more you have a lot of options at your hand to further fine tune everything.
Profiles to me are like the cherry on top, you'll get the last bit of privacy but at a significant cost of convenience (although it's as convenient as it can get, even notifications can be triggered from profiles running in the background). The main advantage in my opinion is to avoid apps sharing data with each other (which is possible with mutual consent between the app developers, you have no say in this). The GOS devs are working on an app communication scopes to give you back control here as well, and once it's released (there's no official date yet) you might not even need profiles at all.
I recommend 2 things:
- Get familiar with the features and settings you have now. They are powerful tools and give you a lot of ownership over your smartphone and system.
- Make or fine tune your threat model to have an easy decision making system in the future. There will be many things of low priority that you don't need to invest time and effort into, but these things are different for everyone of us.
If you want to dig deeper into profile setups, you can check out the threads here, here and here.