Hey Dean, welcome to this community!
Albeit being 60k-th in the queue, you are quite lucky that your waiting will be nowhere near those guys who sticked around for months (and years). The app has launched literally 10 days ago and still in the process of early testing. If you are interested, you can submit your details here. Freetrade picks testers based on a diversity of factors and onboards new batches of users every Tuesday.
Fractional shares. These are not (yet) available for the UK listed securities. However, once the US stocks will be on offer (few weeks/months to go), those are the ones you can invest from as low as £1, which could, for example, let you own 0.0005 shares of Amazon!
Feel free to introduce yourself and ask any questions should you have them 