The short answer is: you’re just going to have to try it and see if it works. Think of it as a learning experience. ??
Still. Some designers give themes that support child themes ONLY with their PRO-versions
Nope, not true. All WordPress themes are 100% child theme-able. The caveat is some (not many, thank goodness!) load the CSS a little differently and that needs to be handled.
See this link as an example.
https://www.ads-software.com/support/topic/child-theme-setup-problems?replies=15#post-2788749
The other gotcha is that some themes, PRO or not, don’t use get_template_part()
but even that is surmountable. That just means that some of their theme components may not be easily replaceable.
Try it, that link that WPyogi posted isn’t that difficult to follow and you’ll expand WordPress knowledge and have fun too.