Short term investment and long term investment is better if you immediately try coins like Ethereum, Binance Coin and Polygon (MATIC). In the last few weeks, Polygon has been moving really well and I think it's worth studying. However, if you want to also try investing in NFT, try studying ENJIN or TEZOS.
i think short term isn't enough and worth it for such coins you've mentioned above aside of NFT, wherein unless if you do staking because for sure no matter what the situation of the market is you still can make profits. But if you prefer normal investment, i mean making your own portfolio , probably long term is always the best choice in my personal opinion.