Grammar fix
I'd say
softly give a view
A gentle way to put forward your opinion or a guess without sounding too certain.
expressionB1core
Hear it in context
Notice where the phrase sounds natural.
I'd say the blue one suits you better, honestly.
A: How long will the drive take?
B: I'd say about two hours, give or take.
Fix the pattern
One small grammar move makes it sound right.
Not: I would to say it's fine.
Say: I'd say it's fine.
'I'd' = 'I would', and 'would' is followed by 'say' with no 'to'.