ppc & ecommerce

I just got certified in google ads and I would like to do my first google ads campaigns in ecommerce but I'm not interested in running an ecommerce business on my own...

I was thinking about purchasing a store creation service etc do you have any tips/experiences with those? the other option would be to contact store owners offering my services for free in exchange for a percentage of the sales..

any tips&experience on how to find right partners? do you think it make sense to contact store owners offering my services for free in exchange for a percentage of the sales? and if that is the case what you guys think it would be a fair percentage?

I think this is the most efficient thing I could do at the moment so I can focus 100% of my time getting better with google ads..and I could even do ppc for more stores...what you guys think?

Sounds like you want to become an advertisement agency and that leads to the very question - performance. If this is your first google ads account, how can you know that you can get decent numbers and breakeven on the campaigns?
No offense, but I just started my ecom business, but for me, I won't hand over my ad budget to someone who has no proven results. I would rather do it on my own.

I think your best bet is to offer your services to someone who are not familiar with computers like middle aged grocery store owners.