It's fantastic that you're using your psychology background to help others. While Fiverr can be a great platform to build a freelance business, it's important to remember it's not always a substitute for professional therapy.
Sometimes people need a safe space to vent or brainstorm coping mechanisms, and that's where you can come in. Maybe you could offer guided meditations or journaling exercises to help folks manage stress. Just remember, you can't diagnose or dispense medical advice – that's when it's best to point them towards licensed therapists or mental health hotlines (sometimes a lifeline in rough seas, you know?).
There might be a way to create a niche for yourself by catering to folks who need a listening ear before they're ready to dive into therapy.