My best advice is to not invest on anything yet, since you are a newbie. You already did try to invest before and made some huge loss (wont be considered loss as long as you are still holding your coins and have not sold anything yet). This time, instead of rushing into investment, try to learn the market first. Learn from your previous mistakes. Then try investing small amount and experiment the market.
Airdrops, to be honest are just waste of time. You need to be extremely lucky to get some airdrop that ends up being quite successful. Do remember these are just free coins given away, so the value will be extremely small.