Are there any better alternatives for Apollo to get a lead list? (B2B niches)

It is recommended to warm up mails for 2 weeks. How many warm up mails should I have sent before I can start outreach?

After setting up microsoft authenticator for my 365 account, I am getting a sending error on instantly. Please help

So the videos recommend setting instantly to warm until accounts are sending 50 warming emails per day. Do you guys keep sending those 50 warm up emails per day and then add another 50 emails on top of it for a total of 100 emails, with 50 cold emails? Or do these 50 warming emails need to be adjusted down (once the account has been warmed up) to make for a total of 50 warming emails per sending account per day INCLUDING cold emails? Aka once it is warm, reduce warming emails to 20 per day and add 30 cold emails per day for a total of 50 per day? Hopefully that question makes sense :)