I've used both products (TCad and ACAD LT) over the last 15 plus years and I always found the TCad interface more intuitive, the program easier to navigate. However, I live in an Autodesk marketplace and the failure of clean file transfers between products caused me to stop using TCad several years ago and I bought LT 2012.
I found that you learn more with both if you RTFM that you should have received with the purchase or, as in my case with LT 2012, the ACAD Bible I purchased from a 3rd party. [Wish I'd read it more, but I have been doing much more project management during the past several years; no where near as much design as I had envisioned. I hope to change this....] Another alternative is to put it under your pillow and take it all in through osmosis.
Seriously, READING is fundamental to learning these tools. Read the fine manual while sitting before that workstation you put your hard-earned shekels into and make it pay. I've been amazed at how one little thread in the book opens the door to so many other tools, approaches, techniques, tips.
Yes, it will take time away from actual work, but it will save you immense frustration and will make you more productive in fairly short order. Please note that my comments are borne in my heavy use of the manuals that I got with V6-9, 11, 14, & 15. Actually, I didn't read the last one much as I started running a couple of very large construction contracts. Not a lot of use for the tools on those job sites.
Best wishes, Damien*
P.S. Does everyone else find those verification codes at the bottom of EVERY message as annoying as I do?
The old Athlon 64 X2 4400+ is on its last legs so Coming soon!
i7-4790k OC to 4.3 MHz, Quadro 2200K, 16GB 2400 MHz DDR3, 256 GB SSD, Win7 Pro 64.