JSE isn’t meant to be mined like that. It’s meant to be mined while you are using your computer for other things. It uses less then 5% of your processing power. Your best bet is to not run your computer just to mine JSE. But if you have a computer already running 24/7 you might as well mine JSE as it won’t increase the power consumption. You could also easily mine JSE and another crypto-currency at the same time and they wouldn’t negatively effect each other.
Yep, just do the mining when you are normally browsing the web and there’s no additional cost or electricity usage or environmental impact. That’s the idea. You aren’t going to be buying Lambos but you can get some cryptocurrency to mess around with and if the markets bounce back the exchange rate to fiat might be more favorable in the future.