How many bidders in your bidder list have worked with Drupal 8? Please do not award, I need the access of your current site to investigate the modules and all. Is this possible to give me access tomorrow?
Here is the process we need to go through:
Fisrt we need to integrate the content, menu, user accounts and all other things that to be transfer from drupal 7 to drupal 8. Then we will apply the theme that you have purchased from the drupal back-end.
About Migration Module - the Migrate Drupal and Migrate Drupal UI modules provide a way to connect your Drupal 8 site to your Drupal7 source; extract both the content and configuration, transform it into the new format, and then save it into Drupal 8.
1) after enabling the all modules Navigate to the "yousitename/upgrade" path on your website at the address bar as url.
2) the a page will be show where all the neccassary steps will be written before start to upgrade, need to press continue to upgrade.
3) then Populate the Source SQL details and the site url to fetch files from. (Host name,DB name, DB username, DB password must be given)
4) need to select the review upgrade button which will show a list of available and missing upgrade paths.
5) atleast need to press the perform upgrade button to upgradation one site to another site.
My initial suggestion is to use migration module but I will confirm as soon as I will take a look into the system you are running currently. I would not charge you for this, so ping me anytime.