The fact that Thor asked the pet store owner for a dog big enough to ride makes a lot more sense when you realize his conception of dogs probably includes creatures like this:
All Our Insecurities Come From This One Thing by Marisa Peer.
I stumbled upon this short video by hypnotherapist Marisa Peer of how you can help yourself when you are feeling insecure with a few simple words. This method of hers has worked on a severe case patients, too.
If you have a bad day or struggles in life, you will lose nothing if you check this out and try the simple method.
I think this will work well in a long run if you are not able to meditate or don’t want to do that.
Another video with checking out by her is this one about self-confidence and it really hit home for me. It’s quite a bit longer, but it’s also worth a listen! https://www.youtube.com/watch?v=ofU58-8q7_M