Hello,
1) You can change the site image from Theme Options > Styling https://prnt.sc/26c4ur9
And home page image from Pages > edit page > 8theme options > Custom background image https://prnt.sc/26c4v88
2) Go to Theme Options > WooCommerce > Single product > Share > change the title https://prnt.sc/26c4vhd
3) Go to Theme Options > Blog > Blog Layout > Excerpt Length (Words) & Excerpt Length For Posts Sliders https://prnt.sc/26c4w5f
Regards