@Marek ****
I don't have anyone helping me, but it's not terribly complicated. You need to go to the Thai Embassy website, but in the country where you're currently staying. If you're in Poland, you apply at the Thai Embassy in Warsaw. On the embassy website, you need to register an account and then select "submit a new visa application." Then, step by step, fill out the form and attach the required documents. Remember to save your changes by clicking the "save" button before proceeding to the next page. I also recommend searching for information in this group. You'll likely find the answers to all your questions there. Good luck!