Don't rush too much, do it gradually, take your time.

Wow. Thanks. I first understood it as don't kill yourself... Hahaha

убиваться means to do sth beyond one's strength

Don't strain yourself too much...

don’t overexert yourself

Don't sweat it (?)

😁🙏

Funny enough, when I saw сильно не убивайся, my first instinct was it meant "don't mourn/grieve"¿
(1) Его вдова сильно по нему и не убивалась - не прошло и месяца, как она опять замуж выскочила.
(2) Ты сильно-то по нему не убивайся - у него в каждой деревне по такой, как ты было.
The context is everything. 😁

(1) His widow wasn't too broken up about his death - his body wasn't even cold when she jumped into another marriage a month later.
(2) I wouldn't be TOO heartbroken over him if I were you - he had one just like you in every village.
CONTEXT IS everything 😉

WOW! 😊🙏