Starting out no need to splurge on fancy boots, though the Fallschirmjäger are a really big part of a correct impression.
Standard, no-notch, non-speedlace leather combat boots will do. Even better the rubber soles won't slip like the pure leather
soles of the FJ boots do. A quick tip to make your impression better; lace the boots bar lace style like the Fallschirmjäger did.
Hessen Antique has the pair you see here.