Feeling like a hypocrite after reverting to Islam, how do I overcome this?

Assalamu alaikum, Ramadan has ended, and I can sense shaytan's whispers starting up again. I'm a new revert, literally just a day or two in, Alhamdulillah, but I can't shake this feeling of being fake. Throughout Ramadan, I learned so much about Islam and fell in love with it, especially the stories of what Prophet Muhammad (peace be upon him) endured and how Allah supported him at every turn. My past is filled with things I'm ashamed of-like seeking inappropriate attention, having been with multiple people, backbiting a lot, and just not being the kind of person a Muslim spouse would want. These things happened as recently as 2023-24, so it's all still fresh. Now that I'm Muslim, I know I've been given a clean slate by Allah, but people (both Muslims and non-Muslims) keep bringing up my past, saying I can't just escape it by declaring myself a Muslimah now. They claim I'm still the same person and that preaching change won't make it real. I've sincerely repented and taken responsibility for my past mistakes, but I understand it'll take time to prove I'm not that person anymore. It's disheartening because I've been working hard to improve myself for the sake of Allah and my own growth. Honestly, it's discouraging when people don't have faith in me. How can I show that I've truly changed? I've been lowering my gaze, being faithful in my prayers and devotion to Allah, I no longer keep close friendships with non-mahram men, and I'm in the process of cutting ties with friends who aren't good for me. I'm trying all these things, but I still feel fake sometimes... did I rush into taking my shahada?