Most of rising new players dump their starbits for buying skills cards to keep ego at 0%. there are not much skills cards collection in game, because you can earn skills by doing music lessons. mostly cards in peoples category have fans + skills but these cards are expensive in the market, especially for new players. 1 fans + skills card with 150 skills 100 fans costs around 9000 starbits which is too much for an average player. few days ago the price of same cards were around 6000. it may increase more in the future, so better way is to get skills from music lessons.
1 music lesson can give you 5 to10 skills per mission without holding any music instruments card. you'll get random skills by completing music lessons. it could be between 5 to 10 skills.
I prefer buying music instruments cards instead of buying skills cards......
Why?
It because the music instruments increase luck and help to earn more skills per mission from music lessons.
Let's suppose you earn 5 to10 skills per mission from music lesson. if you'll have 1 music instrument card with luck 50, it will increase skills reward ratio per mission 8 to 16 (approximately)
10 cards with 50 luck can increase skills reward ratio 35 to 70 per mission. the more music instruments you will have the more skills reward you will earn per missions.
After getting as much as skills you need, you can sell your instruments cards but your earned skill will remain but if you will have skill
cards you can't sell them, because when you'll sell them you'r ego will increase as much as you will decrease skills buy selling skills card.
Note: please do your own research on music lesson and skill cards.