Manage My Social Accounts

I'm starting a new personal blog (mainly to bring in more traffic to my new company but also to build my personal brand along side this). The company is an online property platform (focusing on rentals).

I have never really used Social Media (for myself) but because i'm the co-founder of a new start up i need to promote myself a little more and get my name (and my companies name) out there more.

I would like someone to help me get involved in the social world (as i don't have a lot of time) to just get my name out there. But i want the content to be very London Property focused. Show my expertise in the field.

I guess the biggest social sites would be:
LinkedIn
Instagram (used just for personal use at the moment)
Twitter (just started an account haven't tweeted anything yet)
Maybe Facebook? (used just for personal use at the moment)

Basically i'm up for suggestions and someone to help me navigate increasing my personal brand in the property industry. I don't know what this would cost. So any proposals are welcome...