Adding a header color background to my Subscription Confirmed page?

Site URL: http://www.clubmailedit.com

Site URL: http://www.clubmailedit.com

Hi Everyone! 

Total CSS newbie here just designing my own site to help cut costs. I have made it to the point of testing a sale, and it worked! However, once I purchased a subscription based product, it led me to this landing page that just looked awful! I've attached a photo for reference. If anyone is so kind to help me with the CSS coding for this (or pointing me to the easy to edit page if it's able to be done without custom CSS) that would be great! I need to do the below things:

1) Add a color behind the logo in the header (my logo cannot sit on white, as you see)

2) Ideally, change all of the text to be black other than the link, it can stay whatever color I don't really care that much. 

3) Change the size of the subscription confirmed, maybe making it a smaller header size and more fun (to read Subscription Confirmed!) 

TY in advance!! 

All

All three problems on subscription confirmed page  or which page for problem 1&2?

On 4/10/2022 at 12:53 AM, tuanphan said:

All

All three problems on subscription confirmed page  or which page for problem 1&2?

all three please! 

On 4/19/2022 at 2:22 AM, kendallwatson said:

all three please! 

Can you share link to confirmed page? Or setup a $0 product & share link, we can check easier