You can still accept a convertible debt investment. If you don't do a series A the valuation of the sale of the company will be taken. A sale without investmen

You can still accept a convertible debt investment. If you don't do a series A the valuation of the sale of the company will be taken. A sale without investments in between would mean a debt investor only gets his money back + interest. Given your situation, the debt investor might negotiate a time limit for the conversion (and either a cap or a formula for the valuation at that point).