What advice would you give yourself when you first became an Entrepreneur?

Don't let the fear of failure constrain your ambition.

Choose your team wisely :)

Be conscious of "leeches". Once words gets out that you have or are building a company other companies or individuals will come out of the woodwork offering their services - some of which you need, many of which you do not or are over-priced. Make sure any engagement you agree to is based upon solid financial criteria and not the emotion of wanting to see your company succeed. There are many companies out there that will bleed you dry having you pay them for empty promises.

Lots of things that fall under the "you won't know what you are doing, and that is ok" umbrella of advice. Then also, "don't do it alone if you don't have to". Doing it with co-founders makes it so much more fun and rewarding. You can lean on each other for the things you are good at individually and they can help you stay positive through the down times (which will undoubtedly be a thing). It's a rollercoaster.

Here's my advice to myself. 1. Become a subject matter expert in your idea's target category. 2. Smoke test your idea before you start building it. 3. Build a ridiculously low-fi proof of concept for max $1K. 4. Find trustworthy collaborators who are smarter than you. 5. Set deadlines for hitting your milestones and stick to them.

When I started my business it was all about managing the unknowns to not get lost in doubts. Very often the beginning is hard. Try many, many, many different things. Never stop.

I would have started earlier. The quicker you start, the better off you will be!

Keep passionate and follow your heart!

Don't do it for the money

I'd probably tell myself to start reading case studies first. I entered this field with VERY little understanding as to "how these things work".