Here are the sketches. How can I get them computer generated?

What do you want to do with computer generated sketches? There's not enough detail in these as they are to get a building permit. A professional, though, could, with a little more information, use them in their current form to produce a set of workable plans.

OTOH, you could Google search for Building Plan Software and download free tools to produce floor plans and other drawings which would require you to know a few things about building construction for them to be more useful.

JM$.02W

First? Wall have a THICKNESS! Either 4' for interior and 6" exterior.

What is the relationship on the two sketches? An addition? For a permit?

Get a SCALE ruler. Use the 1/4 inch to a foot side. Learn to walk before you run: )

Or call a draftsman who will get your concept on paper.

We have no clue what you are doing, what if any is the existing or new condition.

What are these for ? Why computer generated at all? These are not even to scale so what are you doing ?????

Try https://floorplanner.com/ . There's a free version for personal use.

I will wait for some feedback from the OP