If I was in your position I would create a list of people who have built an email list of the people your services are useful for.
E.G You offer virtual assistance to entrepreneurs
You need to find people with an email list with entrepreneurs on there email list.
Websites or blogs which help businesses would be your first port of call, create a spreadsheet of them then go and comment on 5 posts of the website you want to send out your affilliate link add value in the comments and do not spam, share their posts on social media at this moment you are developing a positive relationship with the website or blog then send the editor or author an email saying you are dong a special offer for that websites readers because of all the help the website has given you.
That is what I would do tell us how it goes.