resize page content block horizontally

Site URL: https://www.goldanchormusic.com/songs

I get SO frustrated using squarespace. For instance...you tell me, "it's so easy, resize content block by dragging the sides!" And yet...I CAN'T!! I can make it bigger vertically but not horizontally. You know how I made my contact page? Because the block was limiting me to about an inch of width?? I had to add an instagram block. THEN I added a spacer...remember I couldn't edit it to make it wider...so I slid it to the side of the instagram block because now I had another thing to slide NEXT to. Then I could finally stretch the spacer width wise until I COMPLETELY pushed the instagram block out. THEN I could add a text block. Which when I reformatted the font of my text it changed on EVERY page!????!! I have seriously struggled with your "easy" website tools. PLEASE HELP ME because now my music page is doing the same thing as my contact page and limiting the width. Therefore my songs are tiny squares instead of large displays of the cover art. HELP!! SOS!!