I'm glad that you posted here, it shows that you're listening to your gut feelings. Don't feel bad about being inexperienced - we all begin that way. You just need to be careful who you let in. Remember that you don't need to answer every question asked of you. You limit how much information you share.
You don't have to persuade him (or anyone) that you want to stop this. You don't need to convince him or word it in a way that's palatable.
There are people in the world who are manipulative abusers. They like online dating as it's an efficient way to meet targets. They can also lie about things like their age, finances, place of work, beliefs etc. The thing about abusers is that they are constantly scanning for people with poor self esteem and poor boundaries, and people-pleasing tendencies. They will test these things early on to see how you react. They may give compliments then criticism to test your self-esteem. A good tip is to disagree or say "no" and see how they react. They usually move on if you are not an easy target.
You may find it useful to read up on the Shark Cage analogy of abuse.
The Shark Cage metaphor is a trauma-informed framework developed by Melbourne psychologist Ursula Benstead to help women understand and recover from repeated abuse, including domestic and family violence or sexual assault. It uses a powerful visual metaphor: the world is an ocean filled with friendly fish and dolphins, but also dangerous sharks. A shark cage represents a person’s boundaries and human rights—protective barriers that keep harmful individuals (sharks) at bay while allowing safe, positive relationships (fish) to pass through.
Each bar of the cage symbolizes a fundamental human right, such as the right to personal space, the right to say no, or the right to be free from violence. These bars are built during childhood through messages and experiences from caregivers, peers, and society. Not everyone develops a strong cage—some bars may be missing, weak, or poorly maintained due to past trauma. The metaphor emphasizes that abuse is never the victim’s fault; it’s the shark’s responsibility to behave abusively, not the cage’s failure.
The framework includes five steps to help women rebuild and strengthen their shark cages, including identifying existing rights, recognizing boundary violations (via a "shark cage alarm" or gut instinct), and learning how to defend their boundaries. It’s used in both individual and group therapy, and is also adapted for young women through school-based programs. The approach is grounded in human rights and feminist theory, offering a hopeful, empowering alternative to victim-blaming narratives.
For more information, visit thesharkcage.com or explore the Shark Cage Animation on YouTube.
I agree with others that it would be good to focus on finding a community in real life. Make friends from work, hobbies or a place of worship. Let dating take a back seat and work on assertiveness and building a life you enjoy.