Context:
I'm a 20 year old male, who has always been active (played basketball for years), and had a little running experience a few years back. When I was 14 I ran a 5K with no preparation and clocked 20:20. I trained once in a while for a few months, but not serious training or coaching, just went for a run by myself once a week maybe. I ran some more races, and got a PB of 18:25 in the 5K. Also ran a 10K once but started too fast and ended up with a 41:40 time. That was my last race (age 14), since I guess I got a little tired of it, and I was more focused on basketball and other things at the moment and there wasn't time do it all.
Now, age 20, haven't really gone running at all since then (6 years ago). I've still been in shape since I continued to play basketball though. I was also a pretty thin dude, but the last few months I've been hitting the gym quite often, and gained some weight. I'm 189cm (6'2inch) now, and weigh around 82-83kg (around 180-184lbs). Not sure if this would affect my running ability, since when I ran those times 6 years ago I probably was 5'10 and 130lbs or so.
It's also worth mentioning that this past year I've dealt with multiple basketball-related injuries, and that made me feel a little out of shape in general for any sport or endurance activity once I was back.
Anyways, I recently decided I wanted to get back into running, so the past few weeks I've done some training sessions to see where I'm at. Unsure what to expect I just tried to run my best at different distances with no preparation or strategy at all.
I have done thse tests (all races on the road, not track):
400m - 1:08
1K - 3:19
5K - 20:15
10K - 41:58
I plan to keep training to improve my times in general and maybe be able to surpass my PB of 6 years a go. I have tried different types of short training sessions these past weeks (as well as the mentioned test times for different distances).
I was happy with the 10K time and the short distances times too, but somewhat dissapointed I couldn't break 20min in the 5K.
My questions are:
1. What type of complete training is good? I'd like to improve my 5K and 10K times, but also have a decent 1K or mile times.
2. Also, are those times good for someone who hasn't run in 6 years, but stayed active and in shape? In what distances are those times better?
3. Is my weight a little too much for running long distances? I'm still going to the gym and, in other words, does that interfere at all with running?
Thanks you all, and I look forward to tips and opinions from you all, as I get back into the running world!