I'm concerned about the age group of my target user base

Hello everyone, I'm building a marketplace startup in a niche field based in a European country. However, I think i have a potential challenge: approximately 40% of the vendors on the platform will be over 55 years old. This has raised some concerns for me. Specifically, I'm worried that their age might make it more difficult to convince them to adopt the platform. also, I was wondering if the payout process, even with user-friendly tools like Stripe, could be too complex for them. Do you think these concerns are valid, or am I overthinking the situation? Thanks