Things I did in love and deepspace as a noob, which helped me immensely.
1. I concentrated on finishing all the Plushies, Kitty cards, and spare time Achievements. (Quick and easy way to get diamonds)
2. So far, I ignored most of the events' wishes (since I joined while the event was literally over in three days.)
3. I mostly managed to do the weekly stuff on one day (saves me time to level up my memories). Dailies are done daily, obviously
4. I didn't choose a main till I was far enough to get to the point I could choose one. I also never used my diamonds for normal wishes (save them for the events)
5. I levelled up the cards I had so I could come far in the main story and because I barely got any good cards for my main (sylus) Work with what you got for free!!
6. Basically, I just did what I can for free in archivements to get diamonds saved up for when there is an event I want to anticipate in.
7. I used the energy early, use it up for heartbreaker (grt these exp bottles) and come back at lunchtime when the stamina is filled up again and use it to get these crystals to level up your main cards and in the afternoon you can go again (BTW you get free energy i think ut was 30 or 60 everything you log in from 10am to 2pm and from 4pm to 8pm)
8. I also focused to get as far as I can with the cards I level up (Xavier) before I got my main in the deepspace trial. You will get diamonds easily from it.
9. I also made sure to always rank these cards up (it doesn't matter if three star or whatever) because you will get 60 diamonds in total if you rank them up 3 times. The rest of the remaining cards will turn into the powder you could use as a way to get more exp bottles (don't have to thought)
10. I made sure I do the weekly quality time plan each time, which don't cost too much time, but you need to unlock workout before you can do the weekly plan.
11. Training room, easy diamonds.
I think that's pretty much I did. I have had this game for 11 days now, and I do not remember every little step I did, but this is the basic thing I mostly always do in these types of games.