I dont know if this is a great or terrible start for my career

im a junior who got my first job 3 months ago. its at a small company that has only been around for 2.5 years and has like 30 employees. my long term goal is to have a small business by the time im in

im a junior who got my first job 3 months ago. its at a small company that has only been around for 2.5 years and has like 30 employees. my long term goal is to have a small business by the time im in my late 20s to early 30s. i dont wanna remain an employee forever. my issue is i dont know if my current job is good for my goals and for my career if the whole business idea doesnt work out. Its a small unknown company and that has benefits like the fact that i do alot of work both technical and business. im really close to the founder and im learning alot about growing a small business, i am handling clients from start to finish and somewhat managing my own work with clients and coordinating with other people for help. so im kind of my own little project manager. i think this experience ie great for learning how to run my own business in the future. Plus technical wise im still learning a good amount of code related stuff. so the bad is that its a small unknown company which could in my opinion hurt my chances of working at a big company in the future. while thats not my long term life goal it could still be useful if the whole business doesnt work out. plus having a big name on my resume can definetly help, plus its a different kind of experience. Im just worried that my start is at some unknown little company that i may not really be able to get out of the whole small company tier. That would be bad as tbh the pay isnt that good. i know my post may be a bit contradictory but i wanna start a business in like 7 or 8 years but i also want to get some big tech job to help fund that business and act as a safety net if the business doesnt work out. Basically what im asking is if im screwed? if i wanna pivot to big tech or maybe consulting in like 3 to 5 years.