Struggling with thoughts of doubt

Assalamu Alaikum, I'm reaching out because I'm having a hard time emotionally, and I hope to find some guidance from those who've felt this way. Lately, my mind won't stop questioning everything, and it's become a heavy mental cycle I'm stuck in. I can't seem to simply accept things without feeling like I'm tricking myself or missing something deeper. This has really started affecting my deen recently. My thoughts are crowded with doubts that keep me uneasy, like: Why would an All-Mighty Allah, who doesn't need anything, ask for our worship? Why did Allah create life with so many challenges and trials? How do I make sense of verses in the Quran about topics like slavery or women's rights that trouble my sense of fairness? What's tough is I really don't want to leave Islam. My heart is connected to belief, but my mind constantly questions it. Sometimes I look at people who seem to live without these religious rules and feel a bit jealous, then feel guilty for even thinking it. Is this just waswasa from Shaytan, or how can someone like me quiet a mind that always doubts? How do you tell the difference between genuinely searching for truth and just obsessively looking for problems? I'm worn out from all this internal conflict. I just want to feel calm without ignoring my thoughts. I can't picture a life without faith in Allah, but lately following Islam has been difficult. I'm only 19, so maybe I need to learn more? Please be understanding and kind. JazakAllah Khair for any help.