I'm going to throw this in here because it is what kept my love of riding alive....indoors.
Smart rollers - the joy of riding your bike is kept alive indoors, because that is exactly what you are doing...
riding your bike, not just pedaling. Smart technology makes it even better because you get all the benefits of automatic control from apps like Zwift. I still look forward to riding my rollers when I cant get outside. You will look forward to it. It's fun and it's not a mindless activity where your bike is locked in. There are always ways to challenge yourself such as riding out of the saddle, changing your positions, taking a drink <- LOL. I am never left "wanting" when riding my smart rollers. All your gains from riding indoors on these rollers are directly transferable outside because there is no artificiality with application of power or power output as a result of a locked in bike. You get the same leverage as riding outdoors.
The rollers I recommend are
www.insideride.com E- Motion Smart rollers. The E-motion technology takes riding rollers to another level because the bike is allowed to move forward and back under you, making riding indoors even more realistic than plane jane rollers. The rollers come in two configurations, first configuration is just the rollers without smart technology, and second rollers with smart technology. You want the one with smart technology. The E-Motion technology makes learning a lot easier. I'm in my mid 50's and had no issue. My buddy who is a little older than me learned literally in 15 minutes. YMMV, but you will have no problem if you stick with it. When I say 15 min, I'm not joking, he went from riding with the fork attachment to standing out of the saddle.