A Sputnik type trap is ideal to get your young birds looking out so can see there surroundings , then much easier when coming to let them out , my advise would be to leave loft door open fer last hour on a night less chance of bop attacks and birds will explore and wander and will be easier to get in as dusk approaches . As for strains don't worry about them , two types of pigeons good uns and bad uns , however it all depends what your racing goals are . I would of advised to get some sprint based birds , and raced these for a few years to get an idea how to go on . All the best for racing