Help me please!

Hi guys, can somebody tell me which one is the best one to buy? Am 29 and my husband is 45. I know there’s a big age gap there but age is just a number really. We love each other, been together for 8yrs now and we’re blessed with a 4 yr. old boy. And we’re planning to have another one actually. We’ve been trying for almost a yr. now but no luck. ☹️ Just tonight after having sex with him, I ask him if he would consider wearing/using a cock ring? Coz he’s like Speedo Gonzales. lol He’s ok about it though. The reason why I want us to try it is I don’t want us to just have sex just for the sake of trying to get me pregnant but I want us to enjoy it at the same time without feeling the pressure of trying to get me conceive, sex is not the right term but making love.

So for him as a first time user what would be the best one to get? And where (online) ? We’re planning to get one in the morning.