Honestly I'm not a risky trader, iam only buys and sells already well established top 500 potential coins,whenever I notice any coin available in dip I buys and some time after I sells those coins
From my side few tips before invest in new coins,:-
first check the coins behind technology, and check which purpose that coin launch in market, check that new coins trusted score in websites may use social media also like twitter and telegram, plus check any trusted exchange or gaming platform supported that coin.