That's about where mine was when I started TRT. I however have high SHBG which causes low free test. My free test was below the bottom of the range.
Another thing to think about is that it is normal for testosterone to decline with age, but do you want the test level of a young man or an old man? Also at age 40 diabetes is normal, high cholesterol is normal, obesity is normal, but none of these things is desirable.