How do I try to have motivation to do anything?

I think trying to find out why you're lacking motivation is a good start. Sometimes though I get into a slump and don't have motivation and then become overwhelmed thinking about everything that needs to get done. When this happens I break it down by task and I start with one or two small tasks and gradually increase. I find by doing this I gain more motivation because I feel good about the one or two tasks I completed which makes me want to do more. I find when I lack motivation I also beat myself up which makes me feel bad and not want to do anything and then I'm in a cycle. But forcing myself to start and do something manageable, I get over that hump. I think you can try to figure out why you lack motivation and can perhaps try to do it the way I have done. Hopefully, this helps.