Thanks for showing concern. Truth is, I have no money for reviews. And chances of scaling through on both platforms without those tricks is surely a milestone.
If I may ask, is there no other platform we can pitch tent on with zero financing like ads etc
That would be cool
I thought about it too, but I want a primary source of income before going into blogging
FB is a no no. There aint serious minds in most of the groups. Just daylight spammers
Hmmm am not a wordsmith lol. But we all learning and getting better.
Really for me personally I think the niche of the service you offer is difficult. But you can try checking Instagram accounts related to your niche on Fiverr with the use of hashtags. Make an account showing your work and linking a landing page that shows your old work and your Fiverr or Upwork link. Facebook groups of people interested in writers or Freelancers pages where they allow you to show your work.
Try to make friends related to your niche who have been in it for a long time, they will possibly help you a lot with this by giving you advice or even giving you a little push.
The truth is that the best of luck friend

. By the way, I don't know what country you live in, but I think there are people looking for writers on craigslist, maybe you don't want this in the long run, but it can help you find some money to buy some positive reviews. Also, do not close to what I have told you, look for ideas within BHW, I assure you that you will find something very useful in the sub-forums such as:
1) https://www.blackhatworld.com/forums/#social-media.270: They talk about social networks and some tricks to get traffic and even potential customers.
2) https://www.blackhatworld.com/forums/joint-ventures.65/: People interested in obtaining companions on their journey to obtain money through the digital world (Here some people have offered their advertising service for Fiverr taking a percentage of your sales).
3) https://www.blackhatworld.com/forums/my-journey-discussions.167/: You will see the experience of many people in their travels from different niches where you will see ways to get money, traffic, customers, and even ideas to facilitate your journey.
And there are not only these but many more, take a look and you will learn many things