Question: Will I lose supporters if the first email I send is a fundraising appeal ?
No. Your supporters know that you need to raise money. Your first email should lay out the reason you are running, why you are the best candidate, and include a volunteer and fundraising ask.
You should keep track of how many emails you send to your mailing list, and the different asks in each. Take note when people unsubscribe or ask to be taken off your email list (and figure out why). If you recognize a trend, you should think about recalibrating the frequency and message of your emails.
While I don’t know if you have contacted your supporters or voters more generally in other ways, I’ll give random advice anyway!
Strategically, consider couching your fundraising email as an introductory email.
Explain who you are, why you are running, and ask people to be a meaningful part in your candidacy by contributing a small sum.
You won’t lose supporters, but your first email should hit the following notes before you make the ask:
Who you are (short intro)
Why you are running (your platform)
Why someone should vote for you (the vote ask)
-How someone can help your campaign (the money ask)
Hopefully most of the the list already knows who you are and can be depended on for support.
To second Juan Cuba, make sure you track how you use e-mail. It’s very easy to lose email subscribers/supporters by not having a sensible plan on how to send messages out.