I am no expert either, so please take my responses with a grain of salt. But I've been researching GTPs and ETBs extensively (and that includes questions here on this forum) for quite awhile now as I would also really like to add one to my collection in the near future. Here's a few things I've found out that seem to be consistant from several very reliable sources...
ETBs are VERY fragile and can be very tricky to maintain. Husbandry must be spot-on and they can still die suddenly for no apparent reason. They also have a more "difficult" temperament as a general rule.
GTPs are much easier to maintain. They are more forgiving and their needs are easily met if humidity is managed adequately. You do need to be very careful where/from whom you purchase a GTP. The Biak local can be more testy, but the Jayapura and Sarongs are often quite docile as adults with regular and considerate handling.
Neonates are very fragile and should never be handled more than absolutely necessary. So taming a youngster is not really practical. I would consider a well-started juvenile or young adult that is already fairly docile and work with it from there.
Hope this is helpful for you!
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