These are very good considerations. It's very easy to make basic mistakes when starting to play the game. I for example bought a millionaires card before I had the necessary level to use it. I think one of the most important points about the game is to start soon to invest in packs and to grow the card collection. This will not only increase your earning per mission, it will also increase your skills per music lesson.
I have picked this post on behalf of the @OurPick project and it will be highlighted in the next post! 
Yeah I was wondering about the card. I own one but I didn't buy it off the market. I think they said you are not able to use it if you buy it off the market it has to be assigned to you.
Yes you actually need to order it in the discord channel and you need 1 mio starbits on your hive-engine account to be able to play it. You also need to have level 50. I ordered it when I had level 35. So it took me quite some time to get there :-)