To explore an idea, I personally like scholar.goolge.com as my initial search site.
Execute at least three to five rounds of search by clicking on 'related articles' link below each study link on google-scholar and 'similar articles' on PubMed.
Make sure to save the study links as it would be useful later on for Librarian executed formal literature search.
Literature search part1
A formal literature search instruction should be sent to a medical librarian.
Knowing how to use EndNote, or RefWorks software would be very helpful to sort out study citations sent by the librarian.
Literature search part2
Review start & end date
Databases to be searched
Inclusion & Exclusion criteria
Suggested search terms
3 to 4 PubMed study citations
Literature search part3
Register your study protocol on any prospective systematic-review registration sites.
Examples include PROSPERO.
Your actual work, my friend, has just begun.
Literature search part4
Literature search part5
please reach out if I have missed any details on "Literature Search'