OP did not give us anything about himself. We don't know whether they had any knowledge or skills. Is it familiar with computer hardware or any other hardware. and that is very important if it enters the world of mining.
I find many hardware/mining resellers (in my country) where newbies after buying hardware, just need to plugin miner to grid and add his ETH address. And voila, they are in the mining industry.
I wrote my statement assuming nothing about OP besides being a crypto newbie as he said himself. Even if you are familiar with computer hardware, from that to entering the world of mining is a long way to go.
Purchasing hardware and plugging it in isn't something I'd recommend, if I'm being honest. You can't just purchase a random GPU off Craigslist and plug it into your PC hoping to make money. That's not how it works. You have to calculate whether the investment is worth it. You have to know that once in a while, you'll have to replenish your mining rigs or add more power to them. That means you might lose more money in the long run by investing in mining rigs, which is honestly useless if you're only seeking profit. You need more space, some knowledge about mining and components, math, making sure the room doesn't get overheated etc.
About investment, OP also has no give us information, do they need to get some profit in the short or in the long term. and there is a difference whether it is to hold or buy/sell strategy.
Of course, there is always the possibility to invest in a new Defi project and expect some returns from there, but you must agree, a new project (whether or not it is defi, ico ieo..) requires some prior knowledge, research and it's certainly not for beginners.
Well, if as a newbie you put all your life savings into a new coin then no offense but you pretty much should stay away from crypto at all until you get to know more about it. Someone who has some knowledge about hardware components has to be quite silly to put their money in something unknown or too new. It's mostly common sense.. When you hear about crypto, you hear about Bitcoin. That's what everyone should start off with imo. As long as you get how BTC works, you can go on and keep researching to expand your knowledge range.
Short term or not, investing is as simple as finding a local ATM, scanning a QR code and entering some banknotes in the machine. At least investing gives you the opportunity to invest for the short term too - mining doesn't. I think there is nothing easier than purchasing a coin and waiting..