Attics are OK. I have a 2m/70cm Jpole and 10m/6m coupled resonator dipole in my attic. They work well enough and keep the wife happy.
My best advice is read about SLW antennas (short wave listening).
Remember, SWL antennas are identical to Tx/Rx antennas except they don't have to handle a lot of power and the associated high voltage. If either type of antenna has a really high SWR it will be fairly deaf.
Tx/Rx antennas also must provide a low SWR (less than 2:1), not because they are different than Rx-only antennas, but because lots of power reflecting back into a transmitter will fry it.
If you think you might be transmitting some day, what I would do is put up a Tx/Rx antenna with a tuner. Since (I assume) you want lots of bands, I would put up a dipole cut to
not be resonant on any ham bands, add a balun to convert the balanced dipole to in-balanced for the coax going to the radio. 41' is a good choice for your available space. Then use a tuner. With a tuner you can make any antenna your bitch and force a tune on whatever band you want to use.
For my multi-band non-resonant antenna and 100W rig, I use this
MFJ-941 Versa-Tuner manual tuner. Just tune for maximum loudness and write down the knob settings, or you could borrow an antenna analyzer to determine the knob settings.