No, it'll be fine for the most part. Not a bad idea, maybe you'll want to move up the ladder later. Any new hobby or interest is welcome regardless of what stage of the hobby you want to enter (or stay at). Your streamer will suffice for casual use.
Re the graphs, the ability to read them and draw conclusions will typically not be found in discussions, because only those who are versed in reading them will talk about it. On another forum I help out with staff duty, we see about 95% of our members are silent and the discussions are usually restricted to about 5%, with most of the posts being made by between 2 and 3% of members. From my understanding, this is typical for most internet forums.
Nobody will answer a question that hasn't been asked. If you want more info, you can post a query there to ask. The 305 are a decent pair for multimedia, they're not awesome but they're acceptable. For production, they're a no-no. The cabinets are very poorly made with thin material and the amplifiers are Class D which is prone to failure. The rest of the product is actually competent, which is surprising at this price.
