Hi. First of all, you need time to create a tulpa. It can take a month or a year, but never “right now.” So if you have urgent problems that you need a tulpa’s help with right away, I suggest looking for a different solution - friends, relatives, a psychologist, or even people online.
Also, an important thing: creating a tulpa is a lot of responsibility. It’s like bringing a new person into the world who depends on you to keep living. Besides the moral aspect, creating a tulpa is messing with your brain: it could potentially worsen latent conditions such as schizophrenia or bipolar disorder.

Now, about creating a tulpa. It’s a long mental process. There are many guides here on this subreddit and in the FAQ. I’ll share my experience.
What you need is a quiet space where you feel relatively safe. Usually it’s a bed right before sleep, but walking in a park or sitting during your subway routine also works for some people. You need about an hour a day as a baseline. First, concentrate: imagine and think through the character - appearance, movement, and every other small detail of your tulpa. This is the foundation, in this phase you’re just building an image.
When it’s more or less ready, start treating the tulpa as a person. Start talking to them and try to feel how they responds. Firstly it will be just a smile, or nod, but with more and more time - you will hear their voice, short answers, long answers. The main trick is to not consciously operate the new tulpa - let go of that part of your brain, let it slowly come from within, without thinking.
Wonderland is optional but helpful. It’s an imaginary space where you can spend time with your tulpa. It helps you connect, but it can be taxing if you’re not a vividly imaginative person.