How many columns?
The best way to decide is to count how many paragraphs of text you have written for this page. If the number is even you may want to divide your page into even amount of columns (2,4,6,8) etc. If the amount of content is uneven try to use the 3 column grid (3,6,9). This will help your website look professional. And remember, when you Do It Yourself you can always add or remove a little more text or images to make things align horizontally.
If you have a lot of text try to break it up with images. Elementor offers a wide range of widgets, so you could include a counter, a flip card or icons. These will help your website look more engaging!
Every now and then break the grid with either uneven or even row. This particular row will visually stand out from the others so you may want to include there a button with your Call To Action (CTA) or announce an offer.