Learn how amateur radio repeater works. Ten great resource to learn amateur radio repeaters beasics, operations and how to configure radios to work repeaters
Take a look at these homebrew portable antenna projects for 2 meters band, you can build at home.
Morgain 40-80 by IM0JZJ, Morgain Antenna, the old lady, DC Distribution Box Project, Trapped Dipole for 12 and 17 Meters, M0NWK Amateur radio blog by Adrian Leggett, Live DX Cluster M0NWK, ICOM IC-R72E Review, Wellington Scanner Frequencies - New Zealand
HF multi-band Delta loop antenna, 4 Element Yagi for 18 MHz, Bazooka Antenne, Antenne double-bazooka, Bazooka-Dipol, K9AY Loops, Polarization Rotator for EME, Antenna Safety - Elevated Work Platforms, DitDit.fm - Morse Code Podcast,