Posted the below in another thread but not sure if you saw it.
I'd just buy some haha. My first jockstraps were the Intymen brand. Thought they were good but then I bought some PUMP! and CIN2 and then I realised how much better jockstraps could be!
For PUMP! I've pretty much got the same style jockstraps but different colours. Interestingly enough even though they were all the same size some were more comfortable than the other. I've got the Ninja, Fever, and Thunder jockstraps. Check them out here,
http://www.pumpunderwear.com/store/jockstraps.html
I've also got one CIN2 Core Black jockstrap. I really like this one because of the wide band and comfortable pouch. If you want to start with something less "wild" maybe go for this one instead of the mesh style you get with PUMP! Check it out here,
https://www.c-in2.com/retail/catalog/show/core-jock-strap?s=319
I still wear normal boxers but prefer to wear jockstraps. If I could I would replace all my underwear for jockstraps haha. Just don't know what my girlfriend would think about that. Also since they're not a "social norm" I hang them to dry in my room so my flat mate doesn't see. I'm kinda hoping that guys pick up on the trend and it becomes a "social norm" and style in underwear.
You look like you go to the gym and as I've mentioned above, they're great for the gym. Less sweat soaked underwear to deal with and gives you good mobility, support, and comfort. I find them best for leg day, all the bending and moving of the leg is much more comfortable with a jockstrap.
My two cents haha. Feel free to message me if you have any more questions, happy to answer and help.