Sorry, mine wasn't a good answer to your question, just a general recommandation. It had nothing to do with the drug itself but rather your knowledge and experience level with personal fitness. You said you're not interested in sports/competition, so what exactly are your goals? It sounds like you want every edge you can get, but why? The why doesn't matter to me, I'm just tryin to make sure you've asked yourself. Supplements might help in some cases, but it's not the supplements themselves that improve your body...it's what your diet and exercise regimen consists of (which you know). You're going to get fatigued regardless...your body simply needs proper nutrition and recovery time in order to make the improvements you want. Fatigue level will generally improve as you continue to exercise, however, as your body becomes used to it--again, as long as you're getting proper nutrition and rest.
Your individual chance to experience hair loss from DHEA is probably very low, but as with any drug you simply have to make a choice whether to accept that risk because you want the proposed benefits.