Quick way but needs to stream over network
Step1: Rip DVD using MakeMKV, this will output the main movie to a single MKV file (no conversion of source video so same quality as original disc). In MakeMKV you select the video stream you want to extract usually the largest one measured in GB is the main movie. Play the video in VLC or MPC-HC to verify that it is the correct one.
Step 2: Install Airvideo on your iPad and the Airvideo server on your PC, add the folder filled with movies to the Airvideo server listings.
Step 3: Start Airvideo on your iPad and it will play the media. Alternative option use Plex media server and Plex iOS client.
This method involves your computer converting the video stream in real time via the server app so you don't have to manually convert it however this means you always need the PC to stream media to the iPad. MakeMKV is just for extracting the main movie from the DVD disc structure so it can be converted easily.
If you have successfully learned how to use MakeMKV then you can feed that same file with Handbrake just select the iPad preset then drag and drop the MKV file into Handbrake and click on start, the M4V file can then be transferred into iTunes/iPad.
Much easier, get you hands on any programme that rips DVDs to .avi files. Buy an app from the App Store called AVPlayerHD (£2.99) which will play all formats including .avi. That cuts out having to go through the slog of converting them a second time which takes ages of your precious time.