Need help with On page SEO

I"m finishing the last stages of my on-page SEO and I need assistance with completing the following

title meta description,
schema,
image alt tag
title tags,
Robots.txt
XML site map

I am looking for someone who is a seasoned & extremely knowledgeable SEO specialist. If you are interested please message me the word "SERP" to find out more details about the task.