Enchanting.... you can enchant unarmed strike damage to rings and gauntlets.
To level smithing and enchanting without OVER leveling.... you need to restrict yourself.
For smithing, collect pelts from slain animals and craft leather armor for sale. leather bracers will provide more XP per pelt, while leather armor provides more $ per pelt. Additionally just collect any ore you see and craft that as well. If you aren't perking into smithing, you can just use the Ingots you get to improve weapons you find. If you do this MOST of your levels will come from smithing the leather armor... but it works.
For enchanting, do NOT enchant smithed items, but instead use your petty gems to enchant valuable basic weapons you find/loot (after improving them first if you have the mats

). You may also want to use your lesser gems this way. This will be your primary form of enchanting xp. Use lesser and common gems to refill charges on your followers weapons and on staves. Use greater gems to enchant weapons you are giving to followers, and grand to enchant gear for yourself.
The thing to avoid is buying up iron ore & ingots to smith daggers that you then enchant... this will powerlevel your character too fast and remove a lot of fun and challenge from the game.
Other areas to get XP and get character levels since you'll get little to none from combat....
Cast muffle a lot while moving through dungeons to increase your Illusion.
Use Alteration for every fight to increase armor via flesh spells
Craft potions from acquired ingredients
Collect as much loot as possible and sell a lot to level speech
Pick every lock to raise lockpicking
Casting Soul Siphon to level conjuration while filling gems
Sneaking up to enemies and getting sneak attacks
Use restoration for healing over potions as much as possible
Many of these will level slowly, and you'll also not want to perk into probably sneak, conjuration, illusion, or lockpicking... but skill levels add to your character XP which, lacking destruction, archery, and 1/2 hand skill levels, you'll need to level up as many trees as possible.
Also... you may consider using followers that can train you in those skills you aren't using... just for the XP. Obviously Heavy Armor should be first to get that perk, but you can also train up all the other combat schools except light armor.
Biggest problem I see you having is armor rating... using heavy armor gaunlets will nullify mage armor... meaning you'll have a very low armor rating. You might almost be better off giving up the damage bonus from the gauntlets to get 3x strength to your flesh spells it you're dedicated to wearing cloth.... that or wear full heavy armor (or more at least... maybe skip the helm).
Alternatively you could wear light armor for chest and feet. A number of leather/hide/fur types might look light enough for you to not look too much like armor.