A question about fins

I've starting swimming again after about 8 years off. I'm trying to get back into shape to lose a little weight and hopefully start competing again! Anyway, when I was swimming I'm pretty sure we all just used big fins. Now it seems there's about 100 different types (long, medium, short, really short, some have holes, etc). I have been thinking about buying some, but I'm lost. Maybe I shouldn't even use fins? Any suggestions? Our coach tends to have us use the long fins and the short fins (zoomers) for different things. We use the long fins for some of our kicking sets, but the zoomers for some of our sprint sets. I think the long fins are supposed to help with leg strength and foot flexibility, whereas the zoomers allow you to get more propulsion (also working legs harder) with a faster tempo than the long fins allow. I have no idea about the medium fins or the different shapes. :-)

I've starting swimming again after about 8 years off. I'm trying to get back into shape to lose a little weight and hopefully start competing again! Anyway, when I was swimming I'm pretty sure we all just used big fins. Now it seems there's about 100 different types (long, medium, short, really short, some have holes, etc). I have been thinking about buying some, but I'm lost. Maybe I shouldn't even use fins? Any suggestions? Our coach tends to have us use the long fins and the short fins (zoomers) for different things. We use the long fins for some of our kicking sets, but the zoomers for some of our sprint sets. I think the long fins are supposed to help with leg strength and foot flexibility, whereas the zoomers allow you to get more propulsion (also working legs harder) with a faster tempo than the long fins allow. I have no idea about the medium fins or the different shapes. :-)