I did mine via wordpress as well. However, I HIGHLY recommend you post at least 3-4 blogs before you leave so you know how it all works. All too often, people set up the blog before they go, then never post a thing as it's hard to learn to do something new once you're already over there. Learn how to do it here first. On a computer. Then learn how to post from your phone or iPad or whatever you'll take with you. Personally, on my last trip, I used voice-to-text on my phone and wrote my posts into Gmail. Once I edited them there, I copied and pasted them into Wordpress, then added the pics. (At the time, I was told the Wordpress app was not reliable, which I found to be true.)
I would go onto Youtube and search "Setting up a Wordpress Blog." Or something like that. Then, "writing a post on wordpress," then "adding pictures to a wordpress blog," etc.