Need lock fixed on tailgate door of my van

a 07 Honda Odyssey and I need tailgate lock fixed please .
I'm a senior lady and I cannot afford a shop.
And it's so Very important that I can secure my car and know that it's locked all the way.
.
if you know how to do something like this please contact me.
This is so very important please.
I have the actuator lock for the tail gate already .
And then I have to Google to be able to use the key fob to lock it.
If you're in Oroville that'd be great but Chico or somewhere close in Butte county .
Thank you so much for your time.