Either you are a beginner or want to learn. There’s no better way than to start it yourself.
Start with a free blogspot website and try writing articles.
If you have some money, invest it in buying a domain and hosting plan(optional).
Try to create the site. Don’t know how? Google it.
Move one step further. Start creating blog posts and slowly move into optimization and then topic research and keyword research.
The more you do. The more curious you will become.
Starting up with cost around NPR. 2k/3k per year which is optional. But Trust me, It is nothing in comparision to the value and knowledge you will gain If done consistently.
Feel free to drop your queries.