July babies' moms please help me...

Is it ok to start solids if my baby:

* lost tongue thrust

* can sit with support

* has head control

* shows interest in food

* mimics chewing and swallowing actions

* grabs things in one hand and holds in both hands to put them in mouth

But she is only 18 weeks and 2 days?

Or should I wait till she is 6 months old?

Please comment with any points you think is relevant to start or not start solids now.

TIA