I know what Gundam is, but I've never delved deep into the franchise so I'm not quite sure where to start or what to watch. The ones I've been recommended, and seen, are:
08 MS Team
War in the Pocket
Thunderbolt
And I already know to avoid Gundam Wing and that one where it's set in the future and Gundams are used in a fighting tournament or something.
I made a timeline for my own use before, so here:
(sorry about the formatting, looks worse on here without it)
-Universal Century--------------
UC0068-0079: Mobile Suite Gundam The Origin - The Advent of the Red Comet (TV) (2019)
UC0068: Mobile Suit Gundam: The Origin I Blue-Eyed Casval (2015)
UC0071: Mobile Suit Gundam: The Origin II Artesia's Sorrow (2015)
UC0078: Mobile Suit Gundam: The Origin III Dawn of Rebellion (2016)
UC0079-0080:
UC0083: Mobile Suit Gundam 0083: Stardust Memory (1991 – 1992)
UC0087-0088: Mobile Suit Zeta Gundam (1985 – 1986)
UC0088-0089: Mobile Suit Gundam ZZ (1986 – 1987)
UC0093: Mobile Suit Gundam: Char's Counterattack (1988)
UC0096: Mobile Suit Gundam Unicorn (2010 – 2014)
UC0097: Mobile Suit Gundam Narrative (2018)
UC0123: Mobile Suit Gundam F91 (1991)
UC0133: Mobile Suit Crossbone Gundam (1994 – 1997)
UC0153: Mobile Suit Victory Gundam (1993 – 1994)
UC0203: Gaia Gear (1987)
UC0223: G-Saviour (2001)
-Future Century--------------
FC60: Mobile Fighter G Gundam (1994-95)
-After Colony/ Mars Century--------------
AC195: New Mobile Report Gundam Wing (1995 – 1996)
AC196: New Mobile Report Gundam Wing: Endless Waltz (1997)
MC0022: New Mobile Report Gundam Wing: Frozen Teardrop (2010-2015)
-After War--------------
AW15: After War Gundam X (1996)
-Correct Century--------------
CC2343-2345: ∀ Gundam (1999 – 2000)
-Anno Domini--------------
AD2307-2308: Mobile Suit Gundam 00 (1st Season) (2008)
AD2312: Mobile Suit Gundam 00 (2nd Season) (2009)
AD2314: Mobile Suit Gundam 00 The Movie -A wakening of the Trailblazer- (2010)
-Advanced Generation--------------
AG115 – 164: Mobile Suit Gundam AGE (2012)
AG141 – 164: Mobile Suit Gundam AGE: Memory of Eden (2013)
-Regild Century-------------- RC1014: Gundam Reconguista in G (2015)
-Post Disaster--------------
PD323: Mobile Suit Gundam IRON-BLOODED ORPHANS (1st Season) (2015)
PD325: Mobile Suit Gundam IRON-BLOODED ORPHANS (2nd Season) (2016)