Just started playing, what is best to do first?

Do your solos. Get coins and then work the market. It's been very generous. This is my first year NMS and it's been a breeze since the market has been so easy to make coins on. Buy low, sell high. Buy days are Fridays and if there are good Legends on Saturday. Sell on Monday-Tuesday-Wednesday and you make considerable difference. Or, you can buy same day and re-sell same day. Smaller profit but constant if you price it right. Find one good filter and just take the cheapest cards. Easy way to make coin.