My Advice. For success with QRP, use a BIG antenna to get your small power out with maximum efficiency. At 5 W you are already at a big signal disadvantage against the majority of HF operators running 100 to 1500 watts output ! Next, you have to accept that a simple station gets an advantage by using CW, so learning Morse is like training for an atheletic event, Pretty much necessary ! Some DIGI modes are touted as requiring less power to get thru BUT you have to have a computer and buy a suite of programs to encode and decode tha signals, and have a box to interface the comuter with the rig, etc... This makes portable field operation a big headache, lugging all that extra gear.