Need Magento SEO expert for 301 clean up - any reco's?

[SammyT]

My site is a total mess from a clean “crawling” perspective. We are still getting traffic and doing business, but I am afraid from an SEO perspective we are driving with the parking brake on.

There a lot of 301’s and some of them are causing 404 errors. Below is an overview of my 5 year old  magento site which was moved from a 5 year old xcart site (so there is a lot of old junk (url’s) in there). It needs cleaning up and I need a plan and seo / 301 help.

Overview:

Recently moved from http to https - not sure best practices were followed, but we had lots of crawl issues before this move.

Analytics

• Top 100 Landing Pages = 82.7% of entrances

Webmaster Tools

• 594 Pages Indexed

• 65 Not found errors - most involve 301’s - examples below

• Sitemap: 773 Submitted, 395 Indexed

• URL Parameters - 41 - I can’t tell if they are doing anything (helping or hurting)

Moz Crawl

• Total Pages 3,454

• 324 Redirect Issues (258 Temp and 66 Chain)

Magento

• 11,773 Redirects

• 5390 System

• 6383 Custom

• On July 15, 2017 I deleted 40 redirects from htaccess that a developer had put there that were causing problems.

Blog

• We have a wordpress blog installed on Magento site. Years ago it was moved from a subdomain to a subdirectory.