Purchase yourself a smart trainer like the Wahoo kickr V5. This has been a life changer for me. Stuck in lockdown Australia, with Zwift I can ride when ever I want, and for as long as I want too. I now ride about 50km a day, and am the fittest I've ever been.
You get a great mix of cardio, gamification by playing an actual video game, and social networking as you can chat and make connections to others in the game. All from the comfort of your own home.
But be warned - it's a bit pricey to get up and running. All in, I'm sure I've spent at least $2k (USD) on various equipment and accessories and it's also $20/month for the service. To me it's worth it for sure, but running (for example) is very nearly free. Just make sure you think indoor cycling is something you'd be willing to stick with.
Riding bikes the traditional way is great too, but also depends very much on weather, season, and road conditions in your area. I like that the trainer removes all those obstacles.