Not all reviews are created equal.
There are many types of review with different intentions and requiring very different amounts of input.
Organisations such as The Cochrane Library or The Joanna Briggs Institute have very detailed specifications on how a systematic review should be done (see Systematic Reviews - Resources tab).
Consider whether you will be able to meet these requirements.
Read the PRISMA 2020 Statement (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) for a checklist of the steps involved in a systematic review.
See the types of review tab for more information.