GST Gst query - new business

Hi, I have just started my recruitment firm in Gujarat. Being first year of business, my turnover will be less than 20 lacs.

Kindly help me with following queries
1) My clients HO might be in other states, but I will be providing manpower to them for Gujarat state.
Do I need to take GST number?

2) I have taken a membership of job portal to find candidates. They have charged GST to me. Can I get credit for the same?
Looking forward to get solution to above queries