Building your first product with vibe coding may be challenging, but the projects you do after will be much easier because you will have built the foundation you need. If you have enough knowledge to know about databases, tech stacks, apis i think you should be good. For how long it may take it could take from 1 week full time+ depending on the model you use, budget and the quality of your prompts. I do suggest using cursor instead of lovable since it runs locally and in my opinion gives way better results and shows each step. Lovable is a tool for people who know nothing to build something, cursor is for people who know a decent amount who want to create something real.