I enjoy Astrodienst for creating natal charts; I believe Lydia uses this site to create a more detailed version of a natal chart than what's available to guest users. Still, I've found it to be quite useful. From their website, astro.com, you'd wanna click on Free Horoscopes --> Natal Chart, Ascendant --> Data entry page for guest users. Alternatively, here's this long ass link:
https://www.astro.com/cgi/ade.cgi?r...67573656368707265663d31&lang=e&rs=3&btyp=w2gw
The Azazel's Astrology page has a lot of useful information for interpreting what you'll see, but like you said, it can be difficult actually knowing what it is you're even looking at. I'll use an example here to try and explain things.
For whatever fucking reason it's not letting me just load the image here, so here's a Gyazo link for your referencing pleasure:
https://gyazo.com/0d55128ce49be01d369c1f088f09c494
Here's the chart of some fuck who'll eventually be born in the year 2095. The circle in the center represents the Earth, and those black lines forming a grid with numbers in them are the "cusps" of the Houses. That's where you get terms like "Aries on the cusp." In this case, the person has Aries on the cusp of their 1st House. The 1st, 4th, 7th and 10th House cusps are also called Cardinal angles due to their importance, and are called the Ascendant, Imum Coeli/IC, Descendant and Midheaven/MC, respectively. The Ascendant is arguably the most important and represents the horizon line where the Sun rises in the morning; thus, it is also called one's "Rising Sign." For this individual, Aries is rising over the horizon at their time of birth, thus Aries is their Rising Sign.
The planets themselves will move counter-clockwise when direct, and clockwise when retrograde. The entire wheel, however, will spin in a clockwise direction as the Earth rotates, so these House cusps literally change by the minute. That's why your exact birth time is especially important, since this will determine where your House cusps are. If this individual was born just a few minutes earlier, then their Rising Sign would be Pisces instead with Aries "intercepted" in the 1st House. Intercepted signs are located completely within a House; they co-rule the House they're intercepted in, but are not as powerful or influential as the sign that is actually on the cusp. For this individual, you can see they have Leo on the cusp of their 6th House with Virgo intercepted. The Sun rules Leo and Mercury rules Virgo; thus, the Sun rules this person's 6th House and Mercury co-rules it.
Every House has a ruler, and you'll see terms like "2nd House ruler", "3rd House ruler", and so on. "Chart ruler" and "1st House ruler" are the same thing. Because the 1st House represents you and your personality, the planet that rules your Rising Sign is your chart ruler and most important planet. In this example, this person's chart ruler is Mars because Mars rules Aries, and they have Mars in Aquarius. Mars in Aquarius thus becomes the dominant force in their personality and who they are as an individual.
The colored lines connecting planets are aspects. The soft aspects are blue, the hard aspects are red, and then you have ones with dotted lines that are not as strong but still important, like the semisquare or inconjunction. Learning which aspect is which just takes some memorization of math and the symbols. Trine is 120 degrees, sextile is 60, square is 90, etc.. The symbols representing the aspects are in that stair-looking grid on the bottom left.
Lastly, the FAEW-CFM table above the aspects table shows what planets are in what element and type of sign. FAEW is Fire, Air, Earth and Water, and CFM is Cardinal, Fixed and Mutable. This chart here is relatively balanced with a decent number of planets in cardinal, fixed and mutable signs with every element represented somewhere.
Hopefully this clarifies enough that you'll be able to make sense of your own chart and start making some interpretations. Astrology is complex as fuck but fun once you can understand what a chart represents.