Three options.
1. Buy Win 10 Pro "Ebay OEM $40" yes it's legit
https://www.ebay.com/itm/BRAND-NEW-MICROSOFT-Windows-10-Pro-PROFESSIONAL-64Bit-OEM-FULL-VERSION/273086109085?epid=2222993884&hash=item3f9533559d:g:6DEAAOSwc-RalCUB
2. Clean Install.... time consuming -.-
3. You can "try to" force a update to change the version, I have had to do this once and it worked but I can't guarantee it will always work.
Open Registry Editor(WIN + R, type regedit, hit Enter)
Browse to key HKEY_Local Machine > Software > Microsoft > Windows NT > CurrentVersion
Change EditionID to Home (double click EditionID, change value, click OK). In your case it should at the moment show Pro
Change ProductName to Windows 10 Home. In your case it should at the moment show Windows 10 Professional
Browse to key HKEY_Local Machine > Software > Wow6432Node > Microsoft > Windows NT > CurrentVersion, change the same two values as in steps 3 and 4 above
Close the Registry Editor
Insert the Windows 10 Homeinstallation media, do an in-place upgrade by launching the setup from desktop (not booting with Windows 10 Home install media)
When asked, enter your validWindows 10 Home product key and select what to keep(settings, personal files and apps, only personal files or nothing)
Windows 10 Home in-place upgrade will be done now.