Hello and welcome to the forum!
My first response is to suggest that you search both this forum and also the web - there is a wealth of information on this topic already available.
But to be brief, there are numerous 'wired' and 'wireless' options for photo transfer between the iPad & a computer - now your choice(s) will likely depend on 'how many' images you want to put on the iPad - this would likely greatly impact on your decision.
Of course, if you sync your device w/ iTunes, the photos on the computer (images and/or folders) that are checked will be sent to the iPad; for myself, I transfer just a handful so I've made a folder simply called 'iPad Photos', transfer the images I want into that folder, and then perform a sync. There are a number of apps (so an App Store search will help) that can handle this process; I use PhotoSync (check
HERE). Other 'wireless' options include
Dropbox or
iCloud to mention a few.
Hopefully, some of these suggestions will get your started and others hopefully will chime in w/ their preferences - good luck!