Probably the special photography plan - Creative Cloud pricing and membership plans | Adobe Creative Cloud
For details on any program, you should ask in the forum for that program
If you will start at the Forums Index https://forums.adobe.com/welcome
You will be able to select a forum for the specific Adobe product(s) you use
Click the "down arrow" symbol on the right (where it says All communities) to open the drop down list and scroll
to migrate your lr settings/catalogs - How to Migrate LR to Another Computer | The Complete Picture with Julieanne Kost | Adobe TV
the most economical plan for you is the photography plan (both ps and lr) for $10/mo - Lightroom and Photoshop | Adobe Creative Cloud Photography Plan
Can I use my plug-ins with CC?
for program specific info, post in the relevant forum.