If you want to learn RTL design for IoT applications, it is essential to have a good understanding of the basics of digital logic, HDLs, and FPGA architectures. To acquire this knowledge, you can take online courses, read books, or watch tutorials on these topics. Examples include Introduction to FPGA Design for Embedded Systems by Coursera, Digital Systems: From Logic Gates to Processors by edX, Verilog HDL: A Guide to Digital Design and Synthesis by Samir Palnitkar, VHDL: Programming by Example by Douglas L. Perry, and FPGA Prototyping by VHDL Examples by Pong P. Chu. Additionally, you need to practice your skills by doing hands-on projects that involve designing and implementing FPGA-based systems for IoT applications. You can use development boards, kits, or platforms such as Digilent Arty A7: Artix-7 FPGA Development Board, Intel Cyclone V SoC Development Kit, Xilinx Zynq-7000 SoC ZC702 Evaluation Kit, Raspberry Pi Pmod HAT Adapter, and Arduino MKR Vidor 4000. By learning and practicing RTL design for IoT applications, you will be able to create innovative and efficient solutions that can leverage the power and flexibility of FPGAs.