I ONLY use EIN when possible...
BTW NEVER give your ACTUAL birth date.They dont need it.
With a fictitious B/D, ID theft is more difficult. Suggestion is.... use April 1st or Dec 25 etc, its easy to remember.
Applying for an EIN is easy. I ran my own (physical) business for several years and had to get one. Once you've been given a number, it will work for any enterprise you do in the future.
Make sure you do more than just get an EIN if you go with LLC. The IRS considers a single member LLC to be a disregarded entity, which results in your W9 having your social security number on it anyway. You must actually elect to be treated like a corporation to avoid that.