If you are certain you want to switch to GOS you should install it right away.
If you are not sure about what you want you should use the pixel as is for a few days, then switch to GOS for a few days. (And see what you like the most)
I know you don't want to reset it but the fact that you are asking means you are not sure.
Maybe you can give additional information on why you would or wouldn't want to switch to GOS, that way I may be able to give you more usefull advice.
If you are certain you want to switch to GOS you should install it right away.
If you are not sure about what you want you should use the pixel as is for a few days, then switch to GOS for a few days. (And see what you like the most)
I know you don't want to reset it but the fact that you are asking means you are not sure.
Maybe you can give additional information on why you would or wouldn't want to switch to GOS, that way I may be able to give you more usefull advice.