TBH I only log on from time to time nowadays but my general guidelines in no particular order are
Don’t feel too pressured to complete events or grind for limited servants
Rerolling is an option, I would probably go for Herc if you do, but it’s not necessary
Save for the characters you want even if it takes a while for them to come around, the game is generally not difficult and friend supports can carry you early game
Don’t spend too much money, maybe stick to the guaranteed banners or infrequent SQ if you do decide to open the wallet
TBH I only log on from time to time nowadays but my general guidelines in no particular order are
The only reason I even did the new year’s event was because I was only one away from finishing it
I log in every day since it’s a minute long task and it keeps me occupied on the toilet
It’s fun to keep me occupied after dinner, and I get more content about fate characters
Would get burnt out if I did anything more than this, best enjoyed in moderation