You can use strength 0.6 - 1.0
The rest is up to you, just adjust accordingly.
If you have any questions, just comment.
u can use settings
KSampler: eulr a | optional
Schedule: norml | optional
CFG scale: 4 or 5 | optional
Guidance: 4 or 5 | optional
Clip skip: 2 or 1 | if ckpt can
Upscaler: optional
the rest is up to you. those are just the settings I often use