I would also recommend to start with an ILF riser 19" long.
It is not too long for hunting and not too short for target work.
Buying a good quality riser that will last you thru the different limbs you will test, is a good route to take.
If you do not like trad shooting, it is easier to resell a good quality riser than a cheap one.
The metal (aluminum) risers give you a lot of options that wood risers typically don't.
Center shot adjustment, different grip styles and accessories (quiver, sling, short stabilizer etc.) that can be added to the riser.
Arrow tuning will be less challenging with the metal riser because of the added adjustment features on the riser.
Stay away from the short limbs, look for medium and or long series, you will shoot better, more forgiving.
On a 19" riser with medium limbs the OAL will be approx. 58" -62", long limbs will be approx. 62" - 64"
Limb poundage is not typically measured from a 19" riser, so be careful and know what the poundage will be on the riser length you use and your draw length.
Check the traditional web sites, for sale listings, there are usually quite a few options available, reasonably priced.
As Tom said "DO NOT OVER BOW YOURSELF" !!! That is probably the biggest mistake I have seen most new trad guys make.