Please follow these instrauction for padding:
Step 1:Goto online store
Step 2: Edit code
step 3: Search base.css file
Step 4: paste this code at last of base.css and save it
@media (min-width:750px){
.footer__blocks-wrapper .footer-block.grid__item:nth-child(1) {
padding-right: 45px ;
}
}
for Newsletter part it is possible but we need to code access of your store if you are interested then follow my details . it is free of cost.