Is trucking right for me if I only want 40 hours?

Here's the problem you face:
Trucking is exempt from the overtime provisions of the FLSA (Fair Labor Standards Act).
Which means carriers are under no obligation to pay you time-and-a-half after 8/40 hours on the job.
Thus, most companies....even local ones...will work you 60-70+ hours.
There are only a few states....I believe Washington is one...where state laws mandating overtime are applied to local drivers.

Some LTL companies pay overtime (YRCW, UPS, Conway, FedEx...a few others).
This is because the union is still active in that sector.
I ran a local P&D route for years where I only worked about 44 hours per week (8AM-5PM)....because FedEx wanted to keep the overtime down.
But the guys at non-OT outfits like PJax, Roadrunner, R&L...these guys were putting in 60 hour workweeks like clockwork.

If I were you, I'd try and hire-on with Conway, FedEx, or UPS.
You'll probably have to start part-time on the dock....but at FedEx (not sure about Conway) they have a dock-to-driver school.
I know several guys that started on the dock and are now city drivers making $22.00/hr or linehaul earning $70k-$80k/year.

Beyond that...I would avoid trucking if your goal is home everynight and less than 60-70+ hours.
Actually, I would avoid trucking altogether for so many other reasons.
If I could roll back the clock and have another go at it, there's no way I'd choose trucking as a career.

 

I started with coca cola when I was 21 they got me my class A, but delivering beer,pop,ect is long hrs i would get at least 50-60 a week in the summer but The money was great