Can I keep my current theme while I built my site on another theme?

I would to know if I have bought the Theme A and is currently running it on my site, but it has a lot of coding and I am not that good with it. That’s why I would like to purchase Theme B. Can Theme A be still running on my site, while I build Theme B?

After I have completed building Theme B, then I deactivate Theme A and activate Theme B?

At this moment, I only have 1 website. Thinking in the future, if I have more sites, I might have more themes to work with.

Thank you.

Nothing wrong with that :smiley: