Webmasters Infotech provides ASP.net MVC training at the affordable price range with study material.
WHY SHOULD I LEARN MVC (ASP.NET)?
May be following points will be helpful to take the decision for you
MVC Core transition/adoption is still very low except for the brand new projects.
Plenty of projects were developed on MVC 5 in past 3 years and are in maintenance phase, so most of companies are still looking for candidates having experience in MVC-5.
There are fewer jobs in MVC Core at present, however the number of jobs expected to increase for new framework in coming future.
if you want to be the most well-rounded developer , I'd encourage you to learn both at the same time, so you understand the differences between both.