A brake will allow you to see your hits, but I prefer not to use them. Excellent suggestions above, and since you're building, I would definitely have the muzzle threaded.
An alternative option:
My son was a bean pole and didn't like the added noise of a brake, so I would load a 110gr bullet over 10-12gr of Unique to get him started on the fundamentals. We then moved to AR, then 30-30, in a succession of heavier recoiling rifles.
Within the year, he was shooting full house rounds on his own 308 and my 338 WM.
An alternative option:
My son was a bean pole and didn't like the added noise of a brake, so I would load a 110gr bullet over 10-12gr of Unique to get him started on the fundamentals. We then moved to AR, then 30-30, in a succession of heavier recoiling rifles.
Within the year, he was shooting full house rounds on his own 308 and my 338 WM.