Emails Landing in Spam. Advice on Warming

I have been warming now for about 2 weeks with a custom domain and I don't have a blacklisted IP. I have been using Instantly.ai and pip.ai and I'm noticing all of the emails sent to gmail are still landing 100 percent in spam for new emails. I am not even sending any links yet since I'm still warming and I'm keeping the emails very minimal.

My own seed list is pretty small with about 5 emails for now.

1. How many emails should my seed list be?

2. Is pipl and instantly a waste. I'm noticing most of the seed emails they seem to send are to custom domain emails and not gmail.

3. What is the best way to warm and get out of the spam?

The issue was having non .com domains. Never going to waste time emailing with .xyz domains again. Everything is inboxing fine now.

do you mind sharing if you use any tool?