I recommend wearing padded shorts on and off in the first couple of months! You can use them to recover from the saddle sore and then wear them once recovered each time. It gives you a chance to adapt and not miss any days on the bike because of the soreness!
I highly recommend the Power Zone programme when you're ready for a bit of structure. It builds your strength on the bike and provides a programme of classes to take. Matt Wilpers is also a professional cyclist and great instructor. My favourite PZ instructors are Olivia, Matt, Tunde and Hannah. You can measure your progress at the end if you do a FTP test at the beginning and then repeat it. The FTP is the scariest part of this training but it's only 20mins twice over the whole programme.
All of the instructors are amazing for different reasons so it really depends on your personality and your mood. If I want a tough but fun workout then it's Hannah Frankson, fun and a little bit dancy then Leanne, super tough and mind over matter style then Robyn or Jess Sims. The guys are also great - I prefer the Americans; Cody, Alex (super hard) and
My favourite thing for all over workouts are the Bike Bootcamps - Callie is super fun, Tunde is hard but so effective, Jess Sims is a good solid in between of good chat but hard work. And Cody is brilliant for pop, chat and hard work.
If you want to incorporate more strength training in a set programme with thousands of others then join the Hardcore On The Floor group on Facebook. It's brilliant and the page owner is super experienced and puts great programmes together on a monthly basis. Also recommend the Ladies Peloton group and joining the UK Lionesses (best team ever) if you want to join an amazing team for PowerZone and Pelofondo challenges as well as go to fun meet-ups.
Also, I have the Bike+ and the auto-resistance is handy sometimes but I like being able to adjust it to so, for anyone else that's wondering, it's really not essential and doesn't change the experience very much.