Blessings to you, and I bequeath you some of my patience. It takes a while to get it right at first. Hang in there! It will get better!
I got a hernia as well, mainly because I was not as careful as I should have been when I started feeling all better, and trying to do all the things I used to do pre-ostomy. Oops. Now I get my husband or my son to do any lifting that needs to be done, and I am experimenting with what exercises put less pressure on the stoma area. No crunches any more!
The other problem is your feelings of isolation and depression, which create a cycle that just drives it worse and worse. At least, here, you don't have to TALK in order to COMMUNICATE. WE ARE HERE FOR YOU !!!
There can be a number of reasons for leakage, and the correction would depend on where exactly the leak is occurring. If the wafer itself is letting go of the skin and not adhering properly, you might try Stoma Seal made by Costa Medical. This is an ultra-thin ultra-flexible layer like plastic wrap which goes onto the skin around the stoma, and provides a better surface for the wafer adhesive to cling tightly to.
If your wafer is lifting away from the skin from the inside, next to the stoma (allowing waste to infiltrate beneath the inside of the wafer hole next to the stoma, then the barrier paste you have coming will probably help considerably. Just remember to have the warm water trickling in the sink as you apply it - wet your finger to smooth on the paste directly onto your skin in a circle around your stoma, and a matching ring around the inside of the wafer. Remember not to spread the paste across the entire sealing surface of the wafer. In spite of its name, it's really a flexible barrier, not an adhesive.
If your pouch itself is not sealing properly to the wafer, or is letting go, try some samples of different positive-lock wafer/pouch combinations. I like the Hollister New Image - snaps shut strongly like Tupperware, but Coloplast makes some different ones as well. Try out some different ones. The makers will be happy to send you samples. If you order through Edgepark, I know they will send you samples as well (they did for me).
If leaks occur through the re-sealable end of pouches with closures, you might consider the closed pouches you just snap off and throw away and put on a new one - no closures to let go at the bottom.
At any rate, you WILL find out what it takes to have a more normal life. It is NOT the end of the world. We WILL be here to encourage and help you whenever you need us. It's not always easy, but it IS always possible.
Keep going, we love you.