Buying first surfboard vs renting, and board progression

Recently started my surf journey with a friend teaching me on her foamie, but I'd now like to practice more frequently without the need for her and her board. Enter: renting or buying.
I'm wondering what a good option would be with renting or buying a board, and what typical board progression time looks like.
I don't want to be spending hundreds of dollars on a foam longboard that I'll swap out quickly for a smaller board, but on the flip side I don't want to sink money into renting a board if I'll need to be staying on it for a long time.
I feel like it comes down to how long I'll need to stay on the foam longboard for while learning the basics and whether buying is a worthy investment, but I have no reference for how long that may be! Any advice would be greatly appreciated.
(for reference, I'm currently looking at a Softlite CHOP STICK if purchasing. Any insight on this choice would also be appreciated
)
Thanks!
I'm wondering what a good option would be with renting or buying a board, and what typical board progression time looks like.
I don't want to be spending hundreds of dollars on a foam longboard that I'll swap out quickly for a smaller board, but on the flip side I don't want to sink money into renting a board if I'll need to be staying on it for a long time.
I feel like it comes down to how long I'll need to stay on the foam longboard for while learning the basics and whether buying is a worthy investment, but I have no reference for how long that may be! Any advice would be greatly appreciated.
(for reference, I'm currently looking at a Softlite CHOP STICK if purchasing. Any insight on this choice would also be appreciated

Thanks!