Either Paid Ads or SEO or Any traffic channel.
You first need a “Website”.
Where visitors find if you are worth it!

Cost breakup:
↳ Domain name ➟ 1000 Rs (once a year)
↳ Hosting ➟ 2000 Rs (once a year)
↳ Website design (1 time cost) ➟  Starts with 2k for 1 pager site.
(Just functional version).
8-10k is a good start.
My current website is 25k – Premium theme 10k + Designer’s efforts 15k.
(mastermath.in)

Its an one time expense.
Until something breaks, which is rare for small sites.

Caveat emptor:
↳ Don’t be misled into MAINTENANCE charges by Web companies.
Starters don’t need a “regular” maintenance.
↳ Design is SECONDARY for a website.
Copywriting (the words on the site) are MOST important.
↳ Everyone is a “Google Ad expert” on the internet.
Be very very very careful.
Best to get someone who has worked in your niche.
Ask for past results.