How can one learn the method of worshipping Allah, and are there any websites that offer complete Fiqh, Sirah, and 'Aqidah to help with that?

A Muslim must learn what is an individual obligation (fard ayn) concerning the knowledge of Allah, the rulings of purification (taharah), prayer (salat), and so on. It is recommended to read books such as "Minhaj Al-Muslim" by Abu Bakr Al-Jaza'iri, and "Mukhtasar Al-Fiqh Al-Islami" by Al-Tuwaijri. After that, it is recommended to seek knowledge by starting with the books, treatises, and audio recordings of العلامة (the scholar) Ibn Uthaymin, and to benefit from reliable Islamic websites on the internet.